Thanks LoyceV.

All BTC were sent to my Ledger using your advice in the May thread, most sold in June.

SSD with the original wallet in offline Bitcoin Core was then unplugged after I made some encrypted backups of wallet files.

Left in my safe til just now - I removed LAN cable (no wifi card on my desktop PC - definitely remains cold wallet!), plugged in SSD on its own and confirmed it still boots fine and Bitcoin Core as I left it.

All my BCH addresses on blockchain.com say they are CashAddr (P2PKH) format.

That's all really!