Ok so here we go
I did call, and then the river was
This changed nothing, other than I guess the 1% of the time when they limp called T8s/85s/T5s pre and hero has now gone ahead in the hand. (I see a lot of limp calls with ATC suited so it is a tiny possibility, with out reads)
Villain bets about £4.50 and hero calls.
The river call was not based on that 1% of course, just that it would not make that much sense to call the turn and fold the river at a blank card.
Moral of the story, trust your instinct. I asked myself on the turn if most villains would CR with a hand worse than mine, I answered no to myself. Pity I did not fold accordingly.
Thanks for all the replies.