I thought that I would let people know for future reference.

I got the numbers off the old bearing and they were:

SKF
BT1B
328227
CA/Q
GERMANY-S
W21 M

I contacted SFK and they said to contact one of their suppliers. I sent a number of emails out but the company that stood out was M&L Autoparts. The bloke that I was dealing with was called Nigel and very helpful.

I ordered two kits and they came down with a good time. The problem I had is that the bearing supplied by my local Ford dealer was slightly too big so once fitted, it butchered the hub so had to get a replacement one.

Eventually got it back together and it seems to be fine now.

What a nightmare over a wheel bearing!