Not my wisdom ... other peoples
Nigel's stuff can be a little dry to watch but he knows his onions. If you're floating around youtube "Stephen Hayes" and "Skillcult" are also worth watching as is "Nazar H. Nasir" for more details on the actual grafting. There's really no substitute for practising with a sharp knife to get a feel for how the wood cuts.
It was very dry, but informative.
Can you recommend a type of tape to use to attach the scions?
I have permission to take what I want as it saves them having to prune so much so would you like me to send you a scion in the post?
Final apple count is about 9 bag for live bags and people had been taking bags away for the month beforehand so we got the dregs. We have no idea what type it is and it's over 100 years old so no one else knows, and I asked a neighbour who was 95, it was established when she moved in. But it was part of an orchard that was taken out in the 70s so it must have been a good type. There are about 4/5 others in neighbouring gardens. Other than you can eat it we all agree it's as nice as what you get in the shops, we've googled types and not come to a conclusion.
Globular-oval fruit, large-a lot are bigger than my fist, red and yellow skin, cream flesh, doesn't grow on a stalk, hangs directly off the branch along the length of the branch. Makes excellent pies, apple butter and jelly.