ANNEX VU.K.REQUIREMENTS CONCERNING MOTORCYCLES WITH SIDE-CAR
6.SPECIFIC FITTING REQUIREMENTSU.K.
6.3.Direction indicator lampsU.K.
6.3.11.Other requirementsU.K.
6.3.11.4.
6.3.11.4.2.direction indicator lamps on the same side of the vehicle may flash either simultaneously or alternately. The front lamps must not be visible to the rear, nor the rear lamps visible to the front within the zones defined in Appendix 1.U.K.