I just booked my ADR's + 10 today and was never asked to punch in my telephone number, I told the the CM I spoke to that I was from the UK and he just took some info (never asked for my Virgin ressie no) and I was fine. I phoned dead on 12pm, got through straight away with no wait. I got all 10 ADR's at the times I wanted too, except one which was 30mins difference and 1 10mins! I even got CRT!

I'm so happy and will be phoning again in a few days to book my last 4 days. BTW the phone call lasted over 16 mins

Also when I asked for a time around about half past 5 the CM replied I can give you 5.10, 5.20, 5.30 so I said 5.30 please, they don't understand half past!
Good luck.