MOT 1st aniversary

If a lorry is first registered on 1st Sept 2016 does it require an MOT on or before the 1st Sept 2017 or is an MOT required before the last day of September 2017 ?

It needs to be MOT’d before the last day of September, IF the V5 shows that the first day registered was the 1st of September.
However you could it MOT in August, if you show the tester your original V5 he will give you a ticket until the last day of September next year.

So it is the day the vehicle is registered and not the day that it has been put on the road, made an error in the past with a trailer regarding that.

Cheers