There are clearly a good number of very good runners on this thread so thought I would pose a question!
I run a fair bit and I have entered both half and full at Brighton this year! I'm not getting any younger but would love to run a PB in April!
The question is, should I also go for a half PB if I'm feeling good or just use it as just another training run?!
You should decide before the day which is the priority or if both are up there. Then arrange the training plan so that if you go for the half pb you have some recovery for the full. I wouldn't leave it to the day.