I'm booked in for 26 June, so as I'm O Neg anticipate getting the usual pleas to not cancel if possible.
I'm on the organ register, and also the bone marrow register.
In fact about 2 years ago I got a letter about potentially donating bone marrow. It said they needed to do more tests to confirm a match, and asked a few questions about physical health.
I called and discussed it, and then later on the tests came back to say sadly I wasn't a good match. Shame, but I wouldn't be surprised if the fact I was a late 40s obese female (as I was then) didn't factor in somewhere. They were clear that young males are the preferred donors.
I doubt I'll get contacted again to donate bone marrow, I'd be surprised if I matched to many. But would donate like a shot if someone needed it.