
I wouldn't put it down to H&S in the initial problem i reckon its more down to the No Win No Fee claim the ar$e off anyone who hurts you culture. (hence a massive hike in public liability insurance) If you don't sue and for example the "cattle truck" rolls down an embankment crushing you to death your next of kin almost surely will. Or at the very least the driver or the operator/owner will be taken from behind by the HSE. Then the FC or land owner gets $hafted for allowing them to opperate on their land.
But if its all done "safely" (use an appropriate vehicle kept well maintained, supply a qualified driver (psv trained etc) supply risk assessments and safe working method statements) they will be able to get insurance but all this costs money and needs constant work (service costs etc) and ultimately costs a fecking fortune :-(
Thats how i see it although i could be wrong