Quorn is not vegan - fact. It contains egg and in some cases milk too. Quorn came on the market after I was vegan so I've never had it and, as it seems to dominate the supermarket vegetarian option aisles, it has always been a huge frustration that Quorn Foods have never engaged with trying to cater for vegans. News is coming through though of a change with that. Apparently they’ve been working on a vegan version for the last three years, but have struggled to get the taste and texture right. They’ve recently however had a breakthrough using potato protein, amongst other things, to replace the egg and milk.
For the full low down have a look at what Rice Up Wholefoods posted as a result of an email from Solent Vegetarians and Vegans. It's a bit late now for the tastings that they mention but I guess watch that space for more details.
Incidentally Rice Up Wholefoods is a Southampton based independent wholefood grocery store and it looks pretty groovy so worth a check if you are in the area. We certainly would if we were out east.