Good for you waiting to test woodwaj good luck with the 'crotch watch' 
and Good luck for your 2ww one when is your BFP due?
Re the scan, I don't mind you asking at all one I went down to Harley Street (luckily only 10 mins from my office) there are quite a few places on Harley Street including the London Ultrasound Centre (£150) and the Fetal Medicine Centre (£100) that do early pregnancy/ dating/ viability scans. I used the first one and they were great, I would have no hesitation recommending them, so friendly and helpful.
From memory I think you're based up in Warks? Unless I have that totally wrong (sorry if I have!) so I would try looking for local private hospitals with maternity services and you'll probably find some do scans - or you could make a day out of it and pop down to London town (they are open on Saturdays) :)
I just checked our local Nuffield hospital and they do them - actually our local NHS hospital has an early pregnancy unit and they do them too but it's a first come first served thing so lots of waiting. I reckon there are a few places near you.
If you can wait to approx. 7 weeks (or more) you will get to see more, but most places do them from 5 weeks.
So, I have extensively googled cheesecake, soft cheese, cream cheese etc in pregnancy and the NHS suggest cream cheese is ok (PHEW!)