the base plate may comprise a male protrusion for retaining the visor to a helmet by co operation with a suitably shaped female recess other fixing systems may be provided such as press studs hook and loop fasteners and or any other means which allows secure retention of the visor in use and detachability the light fitting 24 may be retained by a suitable integral latch such as a snap fitting tongue or be permanently attached by e g adhesive or co moulding if removable it will be appreciated that the light fitting is in use trapped between visor and helmet against fore and aft movement fig4 illustrates a visor 21 having an alternative lens 31 with individual led 39 s 32 an on off button 33 is provided at the rear edge fig5 corresponds to fig3 fig6 shows a removable light fitting 24 in the upturned state and illustrating the mounting post 34 having an enlarged foot 35 the post and foot 34 35 has length so as to prevent arcuate movement of the light fitting when in the slot 27 a latch depression 36 is provided at the rear edge for a snap fitting latch projection not shown of the base plate 29 an opening 37 at the rear edge allows access for a power.