Befor everyone jumps in and says that this has been covered a million times before can I just point out that it is a variation on a theme to which I cannot find a definitive answer:

Q: Which Polo rad do I need (now the variation) that has an expansion bottle outlet. I have seen some mention of ones with and ones without and one with would make my plumbing a little easier.
Thanks in advance.

I bought this one £27 from the Bay
Linky

Me too - bargain!!! And it weighs about as much as a bag of crisps.

Many thanks. One ordered!