Well... normally I too will have commuted all winter (bar ice days), and will have probably done three 200k rides. I haven't ridden a 200k for a year and the truth is I dont think I could do it comfortably. So I won't. I will accept that I am less fit, accept that I can't judge myself by normal standards because in terms of my riding this has not been a normal time. A big part of it has been general innactivity. Normal life for me is leaving the house at about 6.45am, 13 mile fixed gear smash, with another at the end of the day, but importantly almost no sitting down in between and quite a bit of walking.
I've been sat on my arse/lying on my bed for most of the past 2 months with a run every other day. Of course I'm not going to be as fit. The key for me is a routine that doesn't make getting fit seem like a chore, so I'm looking forward to resuming my 'normal' life in 5 days time.