De-catting and M.O.T.'s

[AJI]

Hello people,

 

 I'm thinking of de-catting my T-T and was wondering whether it would pass an M.O.T. with the cats removed?  

 

 I think the legal standpoint is that if a vehicle had cats in the first place then to pass an M.O.T. it must always have them on. Is this right??

 

Part two of the this question is : Is there a noticable performance advantage with the cats removed?

 

Thanks for any help,

 

AJI