@RCF5v8 Thanks for the info - will probably just get the dealer to sort it as that will be quicker I suspect.
My car is pretty low mileage, so just changed the original tyres as I was concerned about rubber being beyond its best, even though there was plenty of tread left. Similar situation with my previous ISF, which was even lower mileage, so this is actually the first time I’ve had to change tyres in nearly 10 years on a Lexus.