It's not the first time they've claimed to brew their own- they used to pass off Brew No 1 as theirs too. They even went as far as putting a sign saying "Vat Room" or "Brewery" on a broom cupboard door.
I've had their two latest beers though (a lager and a weiss if I remember correctly) and I was not able to identify them as any beers that I had tasted before. Though still no tell-tale smell of a brewery...