well morrisons' main store were very sympathetic and as helpful as they could be, but because they are separate from the fuel stations, i had to go speak to them. there, the lone attendant let me use his phone to speak to the manager, who was not very helpful at all. he first told me I'd have to pay the fine. he also told me the police were involved (i doubted this, as i have not been contacted by the police, and the letter from Pay My Fuel was issued the day after the offence). so i asked him for a crime number, to which he replied that i would have to see him in work tomorrow and he would give me the details. (I'm unable to meet him due to work but he said my wife could call on my behalf), which she is going to do).
morrisons' main store customer services also gave me the main customer services phone number, and also the head office phone number, and from the fuel station i got a business card for MFG, who run the stations apparently, so I'll be calling some of those tomorrow too.
in the meantime, if anyone has any advice, what info should i be trying to obtain from any of these people, I'd be most grateful.