I recall photos on board Task Force ships of SAS and SBS guys wearing as-issued kit (aka G10 For Men). There's a photo I have somewhere of them wearing 68 Pattern combat jackets on deck, for example.

The Cadre never wore anything special to define their role - apart from in Lovats as tynesideirish confirmed.

So a far different scenario from today's SF operators, where the aim is to wear anything other than standard kit

Mark