Here's an example of a spot which crops up somewhat regularly that i'm pretty unsure on. More of a theoretical question than advice on the actual hand.
£1-2, £100-250 deep roughly. Typical stationy fishy live game.
6 limpers to my bb (sb folds), i check

Flop
I lead out into the field (this is fine?) for £8, 4 people call.
Turn

We? And what if the turn was a

,

, or

?
Ty