Ring around your local Lexus dealerships and find the best service cost then go back to your nearest dealership, they will normally match it, I managed to knock my service cost down from £330 to £230 by shopping around. As for the MOT, I have never used Lexus for this, nor has my brother in law, we both use “just mot,s”, as in the title they only do mot’s, so no incentive to perhaps find fault, and a free mot if it fails.
Ps. I have no connection with “ just mot’s “