Thanks.
I logged into the Lexus UK site and found out some information. Obviously it's over 10 years old and had not maintained it's religious cycle I cannot avail any kind of warranty. Clearly I can book a service with them, and when doing that, it recommends the 100,000 miles/10 years option at £505!
Is it worthwhile, I am just worried they'd find a million other things, add it as a advisory work to complete and then I'd feel guilty of not completing it !
The MOT didn't have any advisories since past 2019.