Hi Barry
I had used the mylpg website, and Union Mills was one of the three garages that were listed on the island, none of which did lpg. The other two were Kirk Michael and Ramsey. An example of it not being 100% reliable. It’s a bit baffling why people would submit false entries on the site.
Fortunately I wasn’t desperate, and was just researching for future reference. That was at TT2018, so things may have changed (?)