Thanks for the tip.
I used to get my bottle sorted at Parwin Scuba at Glatton but when I tried just over a year ago I was told Parwin was closed (retirement) and the owner had sold all his equipt to another base. Maybe this was Ramsey? I did get their phone number at the time and rang them; they confirmed they had the equipment but it was not set up. In the end I went to a place in Bishops Stortford (Planet Scuba) but have heard rumours that they have closed down, so Ramsey could be a good asset.
Can you reveal the Ramsey details? Please
Cheers, Phil