Coming late into this thread so apologies.
A snippet I often refer to concerning safety for the benefit of Richard, the original poster:
"Managers will only receive the standard of health and safety that they demonstrate that they want" - Mr Justice Fennel QC, in his report after the Kings Cross fire - quite relevent here.
All I would say is that if you as an MD make safe, quality jobs your priority, then word will spread and you will win jobs - the cowboys - and there are plenty of them - do no one any favours. Stick to your principles - they are good.
HSE do take complaints seriously - honestly! - all offices have a complaints team - it is best to speak to the local office when ringing them in and ask to be put in touch specifically with the complaints team, the numbers for the offices are on the contacts section of the HSE web page - but you have to look on the office directions PDF to get the direct office phone number - it's not on the main office page.
If the scaffold is in an unsafe state then HSE will take it very seriously - the problem they have is getting the inspector there at the same time as the scaffolder - often HSE are left with just a scaffold and if it's a real cowboy there is no nameboard - if you phone a complaint in give them as much info as you know.
Another avenue is the local authority Building Control department - they deal with unsafe structures - street scaffolds definitely come into this and they have the power to organise the scaffolds dismantling and to contra charge the cowboys who put it up - be careful as response is patchy in areas of the country and many LAs aren't keen to get involved in what they see as HSE territory.
As a last point - inspectors get paid mileage and they mostly use their own cars.
Otto