I'd suggest so. Unless your MOT place are ok with this sorta thing.
Yes, but in the unlikely event that they look underneath it they will see the "Race use only" stamp near the outlet and the great big plate that says something like "Usa and Canada only. Not for road use. Does not comply with emissions etc, etc, ..."In theory yes - but in practice - you probably will not have an issue as the MOT stations do not check for the E mark stamp.