Cheers - I will give them a ring in the morning and see which one can fit in a refill. My NOS system is all checked and ready to go now so I want to get on with an on road test.
I have just checked out those places - they are still a fair distance. I was hoping to see somewhere west of Birmingham. As some places are now asking you to take the car down to see you have "legitimate" reason for the NOS a 200 mile round trip is a long was for a refill.