basically its a no.
it is a defectable offence, and you will need to present your car for a pink or blue slip. BUT being a 2dr car, its often a grey area. if you car was engineered as a 2 seater, then you wouldnt need the back seats but if its not, then your open to anal raping with no lube.
i havent had most of my interior in my car no going on 4 years, but for the last 2.5 it hasnt been a daily driver and i have been pulled by johnny lawman but each time they werent too interested on the inside of the car.
do it at your own risk id say....