Air Arms Owners Club

Any one recommend an air rifle friendly refill station who will fill 7L cylinder to 300 bar in either RG26 or W4 / Chiswick area ..

I see there is a Mikes Waterfront https://www.mikesdivestore.com/pages/london-dive-shop just around the corner from the office in Chiswick .. are they Air gun friendly ?

A dive shop would be happy to fill your air tank. They don't care if you dive or shoot, it's all business to them. You will probably find that shooters fill as often, or more often than divers.

One in our village stings you up more if an airgun cylinder. Double the cost of a dive cylinder. They even charge you more for a retest on an airgun cylinder. That's why I don't use them, got bitten once and never again. Plus I tell any other air gunners not to use them. There loss.
So now I rather travel a bit further away, just to save a fiver and give someone else my business.

Mine in Penryn (Cornwall) charges the same for fills and tests as their main customers, the divers. Long way to come though!