Thanks for that, I found this
http://www.landyzone.co.uk/lz/f10/heater-matrix-o-rings-eeek-111606.html which will be spot on for me, this is why this site is so good there is just so many helpful people here willing to help others, just like yourself
Ahh that may give me a good clue (good thinking that man), knowing my luck it's bound to be acidic... but please don't take it personally tomcat, it was an accident! Honest
Well, as you know I take all your advice very seriously, so today I have gone and bought the O rings, a thermostat + O ring, a water pump AND the very reason this all come about that poxy sensor... So that's my weekend gone!! sad thing is
there is so much more I want to be doing with it, rather than spending time and money of these problems
But being more positive I'd like to thank all of you for your help, it is people like you what makes this site great!!