The price actually changed after liftout, so too late then. Even though we confirmed £150 on the day of lift out.
An update: We are well and truly gone at now at our Marina! Phew. It was not without more issues, as on Friday afternoon it looked unlikely we would be going anywhere as another boat with a leak had to be lifted out and into the area they needed to move us in order to put us back into water. I think they realised they would not be getting any further cash from us...
I will write a full post on everything that happened during out time there, but i can confirm you should avoid Clifton Cruisers like the plague. Nothing but trouble, swearing, cowboy money grabbing idiots. I've had my first proper full nights sleep in months and the relief to be out of there is worth every penny.