I worked at Biggin Hill some years back and in the whole its a very friendly place try the following links if its the Airport work you want or Goldair/BHH if its Airline/Ops type work you require to look at..
http://www.bigginhillairport.com/home.htm
http://www.bigginhillairport.com/Aircraft%20Charter.htm
http://www.bhh.co.uk/
http://www.goldairint.co.uk/
Good luck...