Just had E-Mail back from Sainsbury's regarding how many can's you can fill at any one time. See Below:
Date: 04/16/05 08:21:49
Subject: RE: FW: Petrol Station Laws
Dear Mr Rogers,
Thank you for your e-mail.
I am very sorry to hear of your disappointing experience at our Warren Heath Petrol station. I have escalated your enquiry to the relevant team at head office. They have advised that if the cans are certified there should be no problem filling two or more.
Thank you for contacting us about this problem. I will make sure that this information is communicated to my colleagues at the petrol station.
I am very sorry for any inconvenience this has caused you.
Sainsbury's Customer Services