Biggin Hill
I have to say that Biggin Hill is very good value for money, having used it a number of times I find that the opening hours are very good, they supplied a good met and Notam brief without me asking for it, the car park has 24 hour security and the ILS is free when the weather is bad enough to realy need it.
The headline cost is high....ish but when you look at the big picture and quality of service it becomes apparent that it is cheaper than a lot of the other options unless all you want is half an hours flying and a cup of tea.