I have just had a friend in the local police run a check and can confirm that none of the 3 'possible' names mentioned:
John Garnon
Jason Rollings
Adrian Thomas
are registered at the address provided

My friend suggested the following:
I email this person and try to make a deal to buy his chips, suggesting I need to pay cash face to face. If he 'bites', a plain clothes officer will go in my place.

If you want me to help on this one I will need the various emails forwarded to me so I can print them out and pass them on.