Could be the waste gate stuck open too.......

You're doing the right thing, taking it to someone who's experienced, they'll have it diagnosed in a jiffy

 

So, I talked to someone from Zen today. They said that it was probably the wastegate or the cat. But they could not take the car in for a while... So I came home and tested the waste gate and it works fine. So I have ordered a de cat down pipe and I will try and see if that works. I would wait but no one can tell me its safe to drive and when I say ill get the RAC to take it no one wants to store it if it can't be fixed straight away. So watch this space for updates I guess.

 

So.....i changed the cat for a decat and it worked great. It pulls and boost very well.
So I would like to say thanks to all who helped

 

so was it up-pipe cat as ive got similar prob & ive only got up-pipe cat left,i think il be getting rid of it i just hope it is my problem as its been going on for ages...my only reason i havent done it befor is on boost gauge it does boost to 1.2 bar but doesnt chuck you back in the seat like it use too so that puszled me.