After the UK recorded its warmest day of the year so far on Wednesday, the Met Office has forecast a cold snap that will see temperatures plunge, bringing rain and possibly snow. Britain will return to colder weather with a chance of snow for some - only days after much of the UK saw a week of sunshine. Warmer weather brought the hottest day of the year so far on Wednesday, with temperatures peaking at 20C (68F) in some parts... [1726 chars]