Ah, and on the landings: The 90-day take-off and landing currency requirement is a licence requirement under 14 CFR (FAR) pt. 61, so if you want to fly using you FAA licence you have to have 3 night take-offs and landings to carry passengers at night. Note the FAA night is SS+60 to SR-60.
If you want to fly using your JAR licence, which you can do in an N-Reg in the country the licence it is issued [presumably in your case the UK] you only need 1 of your three at night.
Neither FAA nor JAR require these to be full stop.
Small curiosity: If you had a JAR instrument rating you would not need night take-offs and landings for passenger carrying currency when using your JAR licence/rating...