Engineer came and said he’ll have a go but no guarantees, but suspects we have an 80{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} chance. He said the gas has leaked and determined it’s from near the filter so ordered a new filter and new parts. He said out of leaks it’s the best place to have one (we must have knocked it) so hopefully that’s right