Another day of warm weather forecast before Thursday brings thunder
Temperatures topped 21C at Kew Gardens on Tuesday.
The unseasonably warm weather is expected to continue for another day for most of Britain before parts of the country face possible thunderstorms later in the week, forecasters said.
Wednesday will be sunny with possible highs of 20C (68F) but is unlikely to continue a trend of record-breaking February temperatures set earlier in the week.
“Tomorrow will be pretty sunny again for most places,” he said on Tuesday evening.
“There might be a little bit of mist and fog around to start with but that should largely clear.
“It won’t be quite as exceptionally warm so I don’t think we will break the record we have reached today.”
Britain basked in its hottest winter day on record on Tuesday when the mercury hit 21.2C (69.4F) in Kew Gardens, London.
That followed a record of 20.6C (68.5F) at Trawsgoed in Ceredigion, West Wales, on Monday, which beat the previous high in 1998 of 19.7C (67.4F) in Greenwich, south-east London.
Mr Burkill said temperatures will cool slightly on Thursday, but remain in the mid-teens, with a chance of heavy showers.
“Those (showers will be) most widespread in the south and west and some of those could be quite heavy, maybe even the odd rumble of thunder mixed in,” he said.
Mr Burkill added: “For many Saturday is not looking too bad but a weather system is likely to come in, affecting particularly northern parts of the UK.”
Experts have said climate change has played a role in the unusually warm February temperatures.
Bob Ward, policy and communications director at the Grantham Research Institute on Climate Change and the Environment at the London School of Economics and Political Science, said the temperatures were “consistent with the clear climate change signal that we are seeing in the UK”.
