Well after doing some searching around it looks like my heater matrix is fubar :headvswal :( :headvswal so I'm going to by-pass it for the mo, just wondering if anyone knows the dimensions of the bit of hose i'll need to do this, and what kind of places could I get it in?

Thanks folks, (my feet are getting wet)

i used a bit of flexible copper plumbing pipe from focus!

 

the pipes are 21mm i think

 

got a new matrix now so it will be coming off very soon.

Nice one, thanks. So I'll just pop into B&Q or somewhere like that on the way home then :)