A big step forward in my training tonight. Went up to Battersea Park running track and did 5K in 17:42. My aim as part of training for a sub-35 min 10K is 17:30 for 5K so I'm not far away now. It was in the driving wind and snow as well, so was a very tough session!
Looking at projected times using the Pete Riegel Formula, I should be able to hit 36:52 in a 10K, over 30 seconds quicker than my PB of 37:33.