Vast majority of houses are not leasehold. It’s 125 years at lease, and aside from a couple of decades the ground rent was always a peppercorn (actual ground rents started in the 90s and have now finished)

You're right, but the proportion of leasehold is still somewhat high (about 7% of houses in the UK). Kinda weird that it's still a thing. There's also a good scam going where leaseholders will try and persuade you to buy out of the lease for X thousand £, because people want the piece of mind rather than paying the ground rent.

Is there a division within Weights & Measures that handles the regulatory framework for peppercorns?