Hello.
We were trying to move to Winchester when ds was in year 1, and gave up because no primary school had a place (except Stanmore!) .
The school tries hard, apparently, but it's intake is not - ahem - middle class. Stanmore does, however, feed into King's Secondary School which is highly regarded - but I see that probably won't be bothering you as you are only staying two years.
The favoured schools are Western (v. pushy parents), St Faith's (in St Cross - a faith school if you happen to be a practising Christian), and St. Bede's. There is also St Peter's which is near Stanmore, and that's a Catholic school.
Another one which is not particularly popular is All Saints which, like Stanmore, serves a large council estate.
Sorry for sounding like a horrible snob, but I thought you'd like the information!