I think I mentioned this somewhere else.
Since resuming cycling in 2006 I have covered a distance of 52000 miles. In fact, my little potter into the town and back this afternoon has seen to that. For Steve to be on target for the record, he will need to beat that at the very latest by the end of August.
I have no accurate records for my previous cycling existence. I cycled a fair bit when I was a child, by childish standards, but I doubt that amounted to more than 500 miles a year. In my 20s and 30s I cycled quite a bit more: quite a lot of CTC Sunday runs of 50 miles or more and a few reliability rides, plus a bit of commuting, chess matches and pub crawls as well as one 450-mile tour. At a wild guess, I'd say that that may have been a total of 20000 miles over 10 years.
If and when Steve breaks the record, I think I can comfortably say he will have overtaken my lifetime's cycling. Precisely when is another matter.