Anyone with an allotment?

It's just a different way we were told, more common in summer / early autumn, spring grafting is the big stick version.

There are two main techniques for grafting fruit trees – whip grafting, where a short piece of scion wood is attached to the rootstock in late winter/early spring, producing a single stem one-year old tree by the following summer. Bud grafting occurs where a single bud is attached to an actively growing rootstock in the summer time. Whip grafting allows the tree to develop more quickly because it uses a larger piece of the scion wood, however, bud grafting produces a straighter tree and a stronger union.

https://www.theorchardproject.org.uk/guides_and_advice/how-to-graft-fruit-trees/

I should get to try whip grafting too this winter all being well.