If it helps Simon, I did 222 miles in the Yorkshire (then the Elmet, now the Team Swift) 12 in 2011, a couple of months after riding with you for part of the Bryan Chapman. I was only really in the 12 for the lollz, having done the Sussex 24 a month or so beforehand, and I think I might have spent a night riding to the lake district and back the week before as well - I was hardly tapered, and felt it in the TT. I don't recall you being slow in the BCM (and you were on fixed unlike me) so I reckon 227 is within your grasp.