Although not connected with either of the outfits mentioned, I do fly around the Swansea area a fair bit and so I was curious about this and did a bit of research.
From what I know Helicharter Wales run a Bell 206 on an AOC based in Haverfordwest. Someone connected with them used to do training at Haverfordwest, but no longer. Helair(Wales) run a flying school at Swansea using 1 or 2 robbos.
The CAA list of flying schools does not appear to include Helichart Wales at all, either as an RTF or TRTO. If that is so, it seems unlikely that they were doing training.
Although Helichart do not seem to be able to train there, there are 3 registered Hele RTFs there already.
SK, do you want to provide a bit more info? Were they doing pleasure flying in a JetRanger or was it really "trial" lessons i.e. air experience flights?
Helinut