Hang on. I call Malarky!!!!
Who gives a hoot about HOW it was tested as long as it is consistent testing across the countries.
If all testing is equal (car, backpack, carrier pigeon) and UK still comes in with a very low ranking, then the UK is crap and all that money we throw at mobile operators is simple wasted by them. And OFCOM as per all QUANGOS is just as pointless as ever.
We don't use different concrete in our buildings, or tarmac in our roads and we don't have different air than Europe (unless someone now points out there is a different section of stubborn UK Air that slows down radio waves) We are not flatter than Holland and we are not 'pointier' than Austria, S Germany so Geography is out.
So it has to be provision by Voda, EE, O2 etc and how much they actually get their tech to work. Which is proven now to be, badly.
Secondly, I don't care about 14 cities. I live in a town with poor reception. 98% coverage, as long as you stand at the end of my drive with your arm in the air. EE and Voda are both just as bad.