Well i'm a bit chuffed with myself. Out the door at 8am with my cycling jersey and padded shorts on. It was chilly so a light jacket for the first 3 miles. Jeans and a t shirt stuffed in my rucksak between my laptop,charger & screwdrivers. 22.5 miles into London (SE1) from Iver (between uxb & slough). Average speed 14mph in 1hour 40mins. Felt fresh as a daisy when i got there for a few hours work. Quick cuppa with my colleague before the journey home,but now London was busy. Lots of stop starts until i reached Southall. I think i bonked at this point and wished i had eaten before setting off home. Completed the return leg in 1 hour 50 mins at an average of 12.5 mph. Pretty pleased for a 10 year old hybrid which had a D lock,rear rack and my heavy rucksack strapped to it.