I see that it is possible to buy small 900g cans of R134a on ebay. This is not the hydrocarbon substitute. Is it totally legal to have this or does the regulations only apply to larger quantities? I was reading that the law in the UK was subject to quantities over a certain amount. I ask because I want to try R134a in a tiny system I have using a bd35f dc compressor. I never vent refrigerants and always store and recover them properly.

https://www.gov.uk/guidance/calculat...ty-of-an-f-gas