(I must say the Lass'o'Richmond is missing, I have yet to investigate this one).
So, back to the Marlborough: garden is great, wine and beer selection is adequate and the food good: fish in general is great, meat not so tasty and burgers are rubbery and overcooked, the mediterranean platter is great to share with friends.
Service is fine, though quite slow in busy summer days.
Pricewise, it's in line with the other pubs around -not the most expensive, but not particularly cheap. Kids portions are reasonable.
Verdict: thousand times nicer than ending up at Pizza Express and probably one of the best pubs for summer evenings with children and relax WE lunches all year long (book early though).