A note for UK gardeners that Tesco have Belle de Boskoop apple trees for £14.
We can obviously be critical of a Dutch variety being offered when we have plenty of our own waiting to be propagated. An interesting cooking apple though, which doesn't mush when cooked.
I will pass because mine would be pot grown and I don't think that suits heavy apples. For open ground, worth considering. The foliage is coarse, rather like a plum.