The sun was intense on Monday with the highest UV level since the end of September that pushed the thermometer to 24.6C. That high was 9.9C above the long-term average and was the warmest day since 10th September and 2C above the summer month average maximum.
The temperature slowly fell away overnight, but only in the early hours, that in the valleys produced radiation fog again that had cleared by 08.00.
Tuesday saw the sun shine brightly shortly after it got up.The slack wind conditions persisted throughout Monday and overnight with little air movement, the maximum gust was just 8mph and many hours when there was no air movement, particularly overnight. The extensive high pressure, that has been resident over the continent, has begun to weaken and move away so the pressure has begun to fall, down 4mb since yesterday, as low-pressure systems approach the UK.