I'm heading in to Heathrow at the end of the month, looking to make sure I'm a using a good AWD that should work.

The P400000 tourist association one mentioned a while ago in this thread is giving a great rate, but I don't know what I would need to show as having to collect from a counter rather than the fast track preferred, due to the terminal I'm flying in to.

The BA codes are not giving anything at all (which is surprising for LHR), whereas my Lufthansa FTL one (C327301) and Lufthansa credit card (C327302) are giving a small discount.