Tony,
Many thanks for your comments/observations regarding my tribulations this week. It is reassuring that us Lexus owners can query almost anything on here and someone invariably suggests, assists or advises.
Like I said at the start of this post I am delighted with my Sport and in general with the service from Lexus. The only thing that is slightly irritating is the service department of my local dealer trying to intimate that 'sorry your used warranty does not cover that.............' Having said that all my problems have been resolved eventually to my satisfaction.
Anyway thanks guys, see you in eight months time with my next post!!
Cheers.