Thanks everyone for your thoughts, it is great to have people to bounce ideas off!

Colinsmum, we are looking at secondary schools now (independent), but the set-up in the UK appears to be very age-focussed rather than ability-focussed. DS will be starting a year earlier if we go for the skip, but we do need to clarify how that will all work!

Shari, wow, a 3 year skip - I bet it was torture and I know what you mean about the constant questioning (I am always trying to second guess everything); but you are right and I am going to focus on the now.

DH and I need to sit down and have a good think about this one!