Wow what a temp drop!! i really wasn't expecting that!!
Just got the train from hilsea to fareham which is approx 5.5 miles west, and it must be a good 4 or 5 degrees cooler. Im now heading towards the gosport/ fareham boundary whixh happens to be less than a mile from the Met office official station at Gosport fleetlands where it apparently around 18.5C currently.