If UK HSE Standards are so effective.....why has EC not been forced to install Crash Worthy Fuel Tanks in new build AStars?
Because the HSE has nothing to do with airworthiness as I said before.
If you are concerned about people getting injured working in the aviation environment with regards to slips, falls, noise and other hazards then HSE is there to protect them but as far as fuel tanks in an ASTAR it is not even close to their remit.