Horrible things - Twin Lanyards.
My opinion: If you cant do some simple beamwork and walk along a boarded lift (minus the handrails) and do so WITHOUT falling off, then your not only a danger to yourself, but to others yourt working with also and YOU SHOULD NOT BE A SCAFFOLDER.
Late reply I know but been away,
I supply and use nothing but twins in the UAE, the reason is simple it gives FULL and UNINTERUPTED clip on safety.
There are many reasons people fall from height not just because thay cannot scaffold safley. The use of a harness is not all about the size of your c0ck guys it's about going home in the evening.