I know it's not the UK, but in downtown Salt Lake City, Utah, USA, it is currently 105 degrees F, or 40.56 degrees C. In the part of town where I live it's a cool 98F, or 36.67C.
Of course that's data from local home weather stations, which may or may not be accurate, and if so are only for that specific location. According to the National Weather Bureau it's only 94/34 in Salt Lake City, while in Needles, California, which is in Death Valley, it's currently 111/43.9.