I have never been asked to pay anything.🤣
That may be because of my relationship with Staff at Lexus Chester, or its declared policy re courtesy cars. or poor staff training🤣🤣, or some other substantial reason(s).
I`m not aware of any formal Lexus.U.K. Policy on the matter, but believe that the question of whether or not to charge, should be left to the individual Dealership.