Got the letter from Lexus in December and contacted my dealership - got reply about being busy and closure over Christmas and they would be in touch - still waiting, so end of last week contacted my “local” Lexus service dealer (they cannot sell Lexus but can service them) they said ok we can get the keys in a couple of days when do you want to come in it takes about 1/2 hr so we will fit you in almost anytime.
Took it in this morning, all OK - it did take just under the hour, but to be fair the complementary health check and the valet & wash took most of the time, and the coffee was quite good !!
ps still waiting for the printed owners handbook my dealership promised me in September