No worries, we're always happy to help, and as long as someone does it that's the most important thing.
I was out most of yesterday so am only just now catching up again. (Jayne thank you for helping out.
Your pots look like a match for mine for sure but mine aren't marked at all, so I presume same maker but different mould. That we are looking for a British maker is a step forward though, and we know they aren't in the catalogues of Sowerby, Davidson, Jobling or Bagley, so that's four down. There is still Century, whose catalogues we don't yet have access to, and several smaller / less well-known glassworks, so for the time being they will be mystery no. 61 still.
Re the lids - the one on mine is an insert - it looks like some sort of card with a guilloche pattern (faux guilloche?) - it's certainly not genuinely enamelled guilloche. The insert of mine has come loose. I suspect the lids on Sheree's are of a similar construction - perhaps a foil over card (or composite) backing? Once damaged I don't think they are repairable, which is a shame. Sheree may I add your pics to the listing on the GTS site too please? Mystery no. 61 on GTS
Jayne & Christine, thanks for the info re Regent of London - now I've seen the pics I remembered about them!