The POI data for autogas is sourced externally by Phil, and it doesn't always seem to be as up-to-date as it should be ...
I use the FillLPG app and website for the UK and I have found it to be pretty reliable:
FillLPG.co.uk - Your LPG Filling station map
Yes, FillLPG is my preferred app. I only gave the above info for those who misguidedly rely on the locations given in the POI map, which although not completely useles, is very nearly so.