Yoshimi,
Week on Saturday is about the only day I can't make it. That will have to be a Rivi morning. (Mother in Laws 300th birthday. OK I exaggerate, but she's OLD, and the way her siblings are dying she won't have too many more, so I have to go!)
Free this Saturday (Can easily cancel the planned Todmorden ride). Free next Wednesday, or the Weds after. Otherwise just about any Saturday apart from Feb28.
Thinking about it could do week on Sunday if that's any use.
Don't worry about fitness, at present I'm spending lots of time at the osteopath, so my back don't take rough use kindly.