MPW London, 19 turning 20

Hi, I’m currently finishing off a BTEC Level 3 in Business and would preferably like to start a 1 year A Level course at MPW London, however I was wondering if my age would be an issue. I’m currently repeating a year due to unforeseen circumstances but I’ll be graduating this year. I need A Levels in order to make my application more competitive and I plan on doing Law, Geography and Economics. If anyone’s willing to reply I have a few questions.
1) Would I be denied because of my age and are there people my age? (I’d be 19 turning 20 when I begin)
2) Are all 3 subjects, Law+Econ+Geo available in a 1 year A Level course?
3) Are there significant entry requirements with regards to GCSEs if I’ve already completed a BTEC Level 3 in Business (predicted D*D*D*)
4) What’s the culture like there?
5) What’s the application deadlines and are the fees accurate? (just under 40k for 3 1 year A levels!)
If anyone is willing to answer those questions, even if it’s just one, I’d be eternally grateful.