After being swept away by floodwater, following the torrential rain which has hit parts of the north of england and the midlands. Her body was found in the River Derwent in derbyshire. This report from our correspondent danny savage. As floodwaters rose rapidly across the east midlands, derbyshire and yorkshire, a woman died after being swept away in rowsley, near matlock. She went missing in the early hours near here, and her body was recovered from the River Derwent in darley dale this morning. In doncaster, the main river through the town burst its banks and overflowed into nearby streets. Anything and everything was used as a Huge Community effort to save belongings swung into action. Locals are angry, and say they werent warned. It has happened down here a couple of times. Ive had no warning from the council or anything. They should have been out last night, giving sandbags out, all that sort of stuff, but we had nothing. Nearby, i met linda. Her home has been flooded before, but the timing now couldnt be worse. Iam here, 26a, the one with the for sale sign in fact, sold, subject to survey. They were due to come out on monday to do the survey. Are you worried now this has happened . I am very worried. I doubt anybody is going to want to go ahead and buy this now. From above, the flooding can be seen for miles, from sheffield, through rotherham, and to doncaster and beyond. This is worksop in nottinghamshire, where a wide area was left underwater. This caravan park in doncaster was completely overwhelmed and People Living here were evacuated. What has happened to your caravan . They are all every one of them is knackered, every one of them is finished. Are you insured . No. Because you cant get insurance . No, im not entitled to it. So youve lost your home . Yeah, oh, aye, yeah, weve lost our home. Its mid afternoon and its started raining heavily again. All this water flowing past us here is the overflow from the river don, and its going straight down this residential street, where the waters getting deeper and deeper. How much warning, if any, did you get . None, as far as im concerned. Just in the space of 20 minutes, it all came and started coming flooding through. The house is wrecked from bottom up. Carpets, laminates gone, the tvs gone, everything. Electrics been cut off. Were hoping to get it sorted. Like, as long as we are all out and safe, thats all that matters, really. In mansfield in nottinghamshire, a cliff gave way. The landslide led to 35 homes being evacuated. Transport has been badly disrupted, too, roads and railways closed, stations left as islands. Tonight back in matlock, the Prime Minister visited to meet Emergency Service personnel and see some of the damage. In doncaster, the rescue boats will be on standby all night, although water levels are slowly dropping. Danny savage, bbc news, doncaster. Coming up on bbc news, newswatch. But first, click. In towns and cities across the uk, a Tech Revolution is slowly being born. One antenna at a time. Bit by bit, 56 is becoming a thing, and while all the infrastructure might look a bit dull, take a look at this. This is a speed test to this phone, which right now is getting data speeds of 390mbps. Not bad. Yeah, this new network is going to be so fast that well be able to download in a heartbeat and stream video to multiple devices at once. In order to allow this to properly take off, with high speed and minimal delay, were going to see lots of new antennas, each serving small areas. And some of them may use much higher frequency radio waves than previous mobile networks. But having these antennas everywhere has given some people pause for thought. They believe that 56 radio waves could cause health problems, and theyre campaigning for the rollout to be halted. Now, this protest group is small but vocal, and it does seem to be growing. So paul carter went to brighton to meet some of the anti sg movement. Chanting prove that its safe hove, near brighton. Chanting say no to 56, say no to sg it may not be the first place that comes to mind when thinking of the front line of protest. Chanting prove that its safe but campaigners here are making theirfeelings known about plans to introduce sg masts in the area. Chanting what do we want . A ban when do we want it . Now the world health organisation, Public Health england, and the nhs all say theres no sufficient evidence to say 56 poses a risk to health. However, that has done little to placate campaigners. Earlier this year, one parliamentary petition calling for more research into 56 attracted more than 29,000 signatures. So what are their concerns . Public Health England and the government say that 56 and electromagnetic frequencies are safe because they all fall underneath the level of the International Safety guidelines. However, there are huge issues with the safety guidelines. There is a great big gaping black hole. What the safety guidelines will tell you is whether your mast will burn or heat you, but what it wont tell you is all of these Health Effects that are known by science to be linked to electromagnetic frequency radiation. Who decides who is guinea pigs . Who is deciding to roll this out, and on who . Who are going to be the lab rats, the lab mice, whatever you want to call us, because its not safety tested . If someone said to me, fact, 5g is safe, if our government came to me and said, fact, 56 is safe, fact, it has been tested by the telecoms industry, i probably wouldnt have the concerns that i have. But to me, there is no fact there from them. The industry, however, have a very different view. Campaigners will say 56 hasnt been tested and if its not been tested, it shouldnt be rolled out. What do you say to that . I hear that line a lot and it fundamentally misunderstands what 56 is. 56 uses technologies that have been in use in all countries for decades now. The type of frequencies that are used, the radio waves they are using, they are the same ballpark of radio waves that have been used and tested, tested and tested, for decades. The technology that goes into the antennas doesnt fundamentally change the way those radio waves behave. So while it looks and feels like a Brand New Technology from a marketing perspective, its roots are actually inherent mobile Radio Technology that has been tested and used for decades now. What is happening here is very similar to the smoking. The actual Health Effects, the actual science, was hidden. And this is exactly what is happening here. 5g is highly, highly unlikely to cause more cancers than 2 46, and there isnt much evidence of an increased risk in 2 46, if any. Its not the new tobacco. Its not the new asbestos. That just simply isnt true. But despite the weight of scientific evidence, the anti sg movement is growing. Similar groups have been popping up in other areas around the world, fuelled by social media and the internet. Back in hove, the campaigners had the opportunity to present their concerns to counsellors. Exposure to sg radiation will be 21w, 365 days a year, without our informed consent. Nationally, Public Health england provide expert advice on Public Health matters associated with radiofrequency electromagnetic fields or radio waves used in telecommunications. The implementation and regulation of 56 technology is a national responsibility. Chanting save our children is there anything from this point that they can say that will convince you this is safe . Yeah, they could put their case, but the independent scientists and the actual science needs to be properly heard as well. Ultimately, is this a battle you can actually win . There will always be a small number of individuals who do not want to hear from large corporations like us. And there will always be a huge group of people who dont have any concerns about this technology. There might be a group in the middle who could be swayed, and i think that is the group that, yeah, there is a battle to be won, if you like. We do need to make sure people have access to the right information, but they can make an informed decision and not be misled by what is some pretty aggressive scaremongering. That was howard jones talking to paul carter. And to try and address the concerns of those who may still be undecided, we have come to this rooftop in london to take some measurements from a 56 transmitter. And we have drafted in some independent experts to help. Dr Richard Findlay is an electromagnetic field safety specialist, and hes going to be measuring the strength and frequency of the radio waves at different distances from the mast. So, first were going to put the probe right up on the middle of the transmitter. Yes. The middle, coming down. And your maximum reading was. . 550. 551. 6 . So basically, if you were to strap yourself to that transmitter, three metres up there, you would be getting five times the guidelines. Yes, you would be overexposed. Ok, but nobodys going to do that. No. Ok, so should we go over there . What would you say, two or three metres in that direction and see how the signal drops off . Yep. There we go. Wow. 14. 5. So even over the last distance, we have gone down by a factor of, what is that . Thats more than 50 times . Yeah, 550 down to 14. 5, so. 0k, down to less than a fifth of the government safety guidelines. Yes. Right, time to try and make sense of those readings with physicist and cancer researcher david grimes. So, we have seen there that the power drops off really, really quickly, as you move away from the transmitter. Absolutely, and that is what you would expect. As you get further and further away from a source of light, which of course radiofrequency really is, even if we cant see it, the drop off is really, really rapid. And by the time you are even at an appreciable distance away from any kind of transmitter, it is way more likely that your phone itself is going to be emitting a lot more than any of these transmitters are. Do you think one of the worries about 56 is that there is talk of using higher frequency radio waves . Absolutely. I think people have an acute understanding that higher frequency is higher energy. But i think what people need to be aware of is that this kind of radiation is still very, very non ionising. What that means is, it doesnt have the fundamental energy to liberate an electron and cause damage. If you want to cause cancers in things like that, you typically need to cause that kind of dna damage. And the new 56 spectrum is very low energy. It is much lower energy than visible light. More than that, the biophysics itself, the mechanics of how you might develop a cancer or something, we know that this kind of radiation is not ionising. It cannot cause the level of dna damage that you typically expect oi need to cause cancer. And so for that reason, the combination of epidemiological evidence and biophysical evidence, we dont have any current cause for concern. That being said, it is always good to observe and keep an eye on trends to see what might emerge. But we dont expect anything will. So there you go, some real science which i hope has helped you to understand how safe sg signals are. And just for extra information, we are now taking a reading at head level here on the roof, right next to the sg transmitter. And the number is kind of bouncing around the 2 mark. So even if you were walking on a rooftop next to a 56 transmitter as we are, you are still 50 times below the recommended safety level. And thats it for the shortcut this week. Dont forget you can find us all across social media throughout the week on facebook, instagram, youtube, and twitter on bbcclick. Thanks for watching. And well see you soon. Were doing a trail. What is brexitcast . I still dont know. I thought we were just doing a podcast . Not any more ok, so what about you say whats brexitcast . And i say well, im in westminster, well, im in brussels. Were pretty good at getting the insider gossip. Well tell you everything you need to know. I think that would be obvious, wouldnt it . Well, shall we try one and then see how it is . Lets 0k, 0k. What is brexitcast, then, because. . Oh, i was looking at the camera. Sorry