No, I know what Orwell was saying, Beast - I thought you were misapplying it - but I misunderstood what you meant, I think.
As far as I'm concerned (personally speaking) they are all the same - believe xyz & marvelous things will happen.
If we're going to give any of these groups privilege within our society, it should be on the basis of what they do, and not what they believe.
I think they have to demonstrate a benefit to society as a whole to be granted those privileges - such as tax exemption and so on. On this basis, I don't mind CofE getting these because they are very charitable in their purpose.
Catholicism.....not so much. They are very particular about who they decide to help, in a way that CofE are not.
So for me, the difference between a cult & a religion (in the legal sense of the word) is not numbers and/or particular beliefs, but about behaviour and benefit.
Crafty I wouldn't class Buddhism as a religion, generally speaking. I think there are some (minority) forms of it that could meet that definition, but by and large not. It's much more of a philosophy.
But if Buddhist groups here in the UK are benefiting society in some way, then I think they should be legally classed as a religion.