About 1000 entrants in the first 15 minutes.
I'm signed up as a 90hr tandem (Group H, 17:45) but my stoker is unable to enter yet because it keeps asking for his 2018 BRM number, which he doesn't have. I believe that he should be using my PBP entry number to enter (as the other half of the tandem), so perhaps his entry will have to wait for a few weeks. PBP 'knows' that the second half of the tandem is still to enter, so will have kept aside that entry.