Couple of issues in landing at EGLL. Class A airspace and landing fees! I once read that BAA would charge around £300 for landing plus around £50 for every 15 minutes on the ground. My (out of date) Pooleys also says " Light single and twin engined aircraft will not be permitted to us ehte airport".
The full text:-
Availability
H24 provided that prior permission and a clearance number is obtained fronm the MD, HAL.
Operators of Gen and Biz aviation aircraft mayu only operate in the peak during any operating season if they obtain permission from the airport operator as well as a slot in advance of each movement also from the airport operator. In practise, permission to operate in the peak will be deemed to have been granted under the terms of the Traffic Distribution Rules, if a slot for each movement in the peak is granted. Operators who operate at any time may operate the movement provided that the aircraft departs or arrives as the case may be within 30 minutes or after the time of the slot.