Just to let you know MOT under COVID-19 changed on the 29th of June - the 6-month rule only due to cars due to that date get 6 months exception after that March 30th date you go on your normal date in August onwards -
www.whatcar.com

Another MOT extension unlikely during third coronavirus lockdown
MOT test centres will remain open during the third lockdown, but book up early because many are still dealing with a backlog of vehicles