
Brainless they've been able to come in for a long time - I checked Defra's listing just last week and it was still ok to come into Manchester using two airlines from the states. Defra's listing is very clear about this. You're right, it's only appropriate for small dogs - which I'm sure I said.
Newark, New Jersey Manchester Continental Airlines (accompanied animals only)
Las Vegas - Manchester (BMI) (accompanied animals only)
Sanford, Florida Manchester Thomson Airways (accompanied animals only), Thomas Cook Airlines (accompanied animals only
on all airlines)
MEXICO Cancun Manchester Thomson Airways (accompanied animals only) Thomas Cook Airlines
Somewhere on the Defra site it explains that if the dog travels in the cabin then you wait on the plane and they come to you do 'passport' control. I know it says on your link that they can only come in as cargo - but that's not what it says elsewhere. There are routes from Coatia, Mexico, USA etc mostly to Manchester (but I know someone from Europe who didn't fly into Manchester) where a small dog can travel in the cabin...