Pre: I would have raised slightly larger here but no more than 1-2BB's more.
Flop: I would be betting flop here a decent bit larger. There are a ton of overpairs to extract value from and his strong broadway are probably going to be folding to any sizing anyway. I would be going around £4 with the intention of stacking off if raised.
Turn: I like betting again here for value, getting jammed on sucks though obviously. This guy seems very nitty though so I'm wondering how clear cut a fold this is. I would expect 33 to almost certainly be folding pre, I would have though a player with these types of stats is folding a decent amount of his PP's that are 77 or worse. This leaves 88 for his value jams. 2 pair combos are possible but again not overly likely for someone playing these kinds of nitty preflop ranges. He could potentially be jamming 99 after picking up the open ender, and may have just decided he is going with his other stronger overpairs as well. I think it's definitely going to be close between the two options, given the price we are getting I probably just click call but I would not argue heavily against the fold either.