Right, I know its on here some where but cant find it at all.

Just changed the central locking ECU as mine was knackered, central locking now works but the alarm/central locking has packed up???

If anyone can give me the link to re-programming the key I would be greatful.

Cheers

Your right this subject has been up a few times, I take it you have a single button fob so have a look at this link.
Program and Reprogram Your Car Remote Key Fob Control Transponder - Program Your Keys Free Instructions - Program Car Keys - Land Rover

For a two button fob just press the lock button four times to resinc. they can't be programmed unless u have acess to 'testbook' or similar.