I am not committed to this Lexus dealer, in fact i asked for the price from three different lexus dealers, and £797 vas the cheapest. the most expensive of the the three was £895.
All my previous services has been performed by lexus garages. Isn't there some advantages that all services has been done by lexus?
I agree that my belt looks good, so i think i will wait with the repair for now, and as you say check it a few times a year.