Welcome to the thread.
This is what I run not the best but much better then the stock composite junk that comes stock. Coarse just about anything is better then the stock one. I hope to change it to a better one some day but the one I want cost over 3 times this one. All so being you are in the UK do not know what is available.
http://www2.towerhobbies.com/cgi-bin...?&I=LXBMH0&P=7
Here is another on that is cheap
http://www2.towerhobbies.com/cgi-bin...?&I=LX3419&P=7
There are MANY pipes out there.