by the fact the police have said there will be an enhanced police presence in the town in the coming days. forensic postmortems will now be carried out to establish how the teenage boys were killed and how two lives were so tragically cut short. phone networks have agreed to automatically block internet calls from abroad that pretend to be from uk numbers, according to the telecoms regulator, ofcom. the move is intended to stop millions of scam calls made by gangs based overseas. the unprecedented move comes after phone companies were criticised by the national crime agency for failing to tackle a huge rise in scam calls and texts over the past year. tesco's website and app is working again after hackers caused problems with the supermarkets online service. shoppers were unable to book deliveries, or amend existing orders over the weekend. tesco has apologised and said its teams worked around the clock to restore the service.