I bought a BP gas-lite for the BBQ in the garden years ago. When the Calor-lite issue 1st kicked in (2017?) I grabbed a pigtail with a compression fitting for my gas-lite. About 2 years ago, our B&M switched from Calor to BP/ Flo-gas, and offered a new full Flo-gas lite cylinder for the cost of a refill if you traded your Calor bottle, but didn't actually want the calor bottle back!
I now have 2 Flo-Gas lite (one 5 and one 10) which will fit in my Unicorn side locker just fine, and 2 empty Calor bottles in the shed (one lite, one a regular 6kg). Trying to decided what to do with the emptys - keep them in case flo-gas lite goes away, or get rid to save the space and potentially get some sort of refund. I feel bad having an empty calor lite in the shed as its one out of circulation that someone could use...