I would have honeydew melon to start followed by the gammon & pineapple jacket potato instead of chips (taken as a healthy b) and then fresh fruit skewers and syn the sauce it comes with.
I'd have the prawn trio (soy and ginger should be low or syn free) and then any of the grill stuff would be fine with a jacket instead of chips, even the mixed grill is SW friendly with not a sausage in sight. The fish sounds gorgeous too. Might have to have a trip to beefeater looks pretty easy to stay on plan there x