Stansted airport has been taken over by Manchester Airport and to ring for information on parking it is an 0871 number at 10p a minute!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Any one out there found another number? 

Don't know if this is any help (& it would be worth checking these out very carefully before using) but when you google Stansted Airport there is an ad with an 0333 257 2961 number. Also there is a website "Holiday Extras" which is promoted by a number of reputable holiday companies (we were pointed in their direction by the travel operator we are using this year) with telephone numbers 0800 977 5171 & 01303 816003.   As I say, these could be worth a try but it must be remembered there are some "unofficial" car parking "operators" in that area but Holiday Extras should be OK.