Disagree strongly with CVW. I've found Biggin and Southend to be the model of courtesy and helpfulness. OK, the landing fee isn't cheap, but you get ILS, NDB or VOR, a big runway, approach control, and Customs all provided.
If I'm coming home in grotty IMC, I can't imagine anywhere I'd rather be landing than Southend. If I'm in the slightest concerned about the WX, I ask for and get radar vectors to the ILS. They don't complain, they don't mess about, they just do the job professionally.
The folks in the Southend FBO are so helpful they've become close friends over the years I've been flying (single engine) from there. Sadly, Stu and Bonnie are retiring this year, but George and Tracy will still be there.
I don't go to Biggin as often, but they didn't seem to mind that I had only one piston engine. I still got the full ATC service, and taxi instructions to the place I was going.