would a map need tweaked if changing from decat to sports cat
 

Am changing my decat to sports cat for mot.would i need to get the map adjusted as i aint going to put decat back on or should it be okay?

You need a map tweak. The sports cat is more restrictive than your decat & the map will need adjusting accordingly.

Needs to be tweaked.

Drive her easy and itll be ok, its only if you are horsing it you will potentially come across any issues. Mot cat test is at idle too so wouldnt worry about it.