eazypark meet and greet through purple parking they have a special offer on at the moment I have just booked for August the 30th Turkish airlines to Istanbul from T1 then back on the 16th of September with Monarch T2 £56.70 like stoop says T2 you have to go to the drop off point to get your car its less than 5 minutes walk, at T1 there was (last time I went) special drop of bays for meet and greet right out side the terminal doors.
Make sure you ring 20 minutes before because the last time we used them there was no record of us booking ( a mix up between purple parking and eazypark) I always use meet and greet and if you book a good few months in advance you can get a good deal.
its a lot better than stood around at 2 in the morning waiting for a minibus