Apple Trees Ordered

We ordered a couple of apple trees from a nice organic nursery down in Ayreshire, seemed like a friendly chap and he was keen for us to choose breeds well suited to our area. We've ended up purchasing Laxtons Fortune and Red Windsor, both on M26 rootstock - whatever that means. Hopefully they'll arrive soon enough and we'll get them planted, and will be enjoying lovely juicy apples within - erm - a decade?