We've a brilliant Timpsons. Lovely guy. Never let us down. Yes, they are independent franchises. Not really noticed key cutting was expensive - maybe a bit more I suppose, but not noticed any significant difference to the other shop I sometimes use when I'm in a different part of town, maybe a pound different but certainly nothing noticable.
Took a couple of new belts in last week for an extra hole to be made and he didn't even charge! Replaced an iphone battery a few weeks ago for only £20 (fitting and battery) - that's hardly expensive! Last year, he charged £3 for adjusting the strap on a shoulder bag by removing the old rivets, cutting and restitching the end and then inserting a couple of new rivets!
A couple of years ago, DS's ipad died. Timpson guy checked it with some kind of electrical gadget, confirmed the battery was fine and that it was a circuit board problem, which he couldn't do, but could send it away to a different Timpson guy who specialised in them, which we agreed to. It came back within the week, fully operational, cost just a tenner as it was apparently a very minor issue! It's worked fine ever since! A tenner barely covers the cost of the postage both ways! Our other quote from an authorised/accredited Apple repairer was minimum £150 just to look at it and diagnose, paid in advance!
I've said many times to OH that I can't understand how the Timpson guy makes a living, but he's literally always busy, so I suppose a constant stream of a few pounds every couple of minutes does add up!