Thanks for the replies mate, really appreciate them.It looks quite clean coming out of the exhaust no thick black smoke which is a good sign. Next that new pipe you said you was going to buy well get one it is stuck together with tape by the looks of it and that is not good. Next when it is dark tonight lift your bonnet and look at your plug leads you may find that they are glowing in the dark.In which case you will be getting a weak spark at the plugs invest in a lead or all new leads. Try that and see how you go.
I'll check the plugs tonight.
With the hot air pipe, I kinda broke it while trying to take it off the other day. But it's really ugly and needs changing. Can you think of anything I could use as a substitute? Easy option is an extractor fan tubing, but I want to find something a but more similar.