yes understand that fully as to the effect. but slightly off topic regarding the MOT fail how can manufacturers get past the lighting regulations in regards to mounting indicators on the movable bootThe coding can only set the lights to flash alternately. Modules delay the outer cluster in order to create a semi dynamic effect. two very different things the latter of which looks much better and won't be an MOT fail in the UK.
(b) Where two front or rear direction indicators are fitted to a motor vehicle first used on or after 1st April 1986, and two rear direction indicators are fitted to a trailer manufactured on or after 1st October 1985, in each case they shall be fitted so as to form a pair.
(c) A rear direction indicator on each side of a vehicle shall not be fitted on a boot lid or other movable part of the vehicle.