My understanding of it is that your can do whatever flights you like and the tour will count as long as you do all of the legs in order. If you look on the tour page it says
"You may fly other flights (like EuroHarmony, EuroCargo) between the tour legs. For example, you fly EHM-A602, then EHM-2703, EHM-E105 and then EHM-A603. Just remember to do the tour legs in order. If you don't know which was the last leg you completed, check your pilot profile."
As for the EGBV, I completed the UK tour a long time ago and I also could not get the airport to work in FS9. What I did was flew to the location of EGBV, did a flyover and then landed at the nearest airport. I wrote this into my PIREP and the management accepted it ok.
Hope this helps
Tom