Renewable, sustainable and local heat sources. that would include things like ground source heating connected to district heating. low—carbon district heating works best in towns and cities. these schemes in gateshead and london are just the start. many more will be needed if the uk is going to meet its climate change targets. rebecca morelle, bbc news, gateshead. one of the highlights of the racing calendar, the cheltenham gold cup, takes place this afternoon — with rachael blackmore hoping to make history by becoming the first female jockey to win the race. our sports correspondent andy ...