Yeah I too gave up on BBC weather since MetOffice stopped doing them. SO inaccurate its laughable, it was just the other week we had big dark clouds all overcast and it was blowing a gale outside, those metal construction fences getting blown down and building materials all over the place, 11 mph with light cloud and sunny spells according to BBC, where as Accuweather on my phone showed a more realistic 46mph wind with dark heavy cloud and a 54% chance of rain.
I tend to use the Accuweather that comes on my phone these days, its not perfect but it pretty damn good, the minutecast is surprisingly accurate, but then i guess short term(out to ~90min) forecasting will always be much more accurate than predicting the next day or beyond.