Bus, unless the saturday run goes perfectly, what Dean says. If an ankle is weakish already, you don't go and try and storm an offroad course that invites ankle trouble!
It's not like you need to do this one, you don't have the club link like me and Phil do, so it is a no brainer, focus on the big prize. You're in half marathon pb shape, and road is what you quote in years to come.
(having said that, obviously it'd make it a better trip if you're along, also for Chichester, don't forget that one, that's our magical fast 10k we've been looking for!)
Phil, are you definitely Tadleying, haven't seen you on here for a bit....I'd presumed i'd be taking you and Bus, but we didn't actually arrange it! Let me know! Sat nav works now! 
ps Dean, those 200s still look quick come today 
Iron, could Tadley finally be the race we meet you at? It's not like we've missed about 10 different opportunities this last couple of years 