I'd guess it's more to do with the 'sue at the drop of a hat' mentality that seems to have engulfed the UK, exacerbated by 'no win, no fee' legal practise.
Example? A supermarket employed a clown to perform at the opening of a new store. He was not allowed to blow bubbles with one of the little rings from a small pot of soapy liquid because the floor might get wet, somebody might slip, injure themselves and sue. He wasn't allowed to make animals, etc., by twisting balloons together because a staff member or customer (especially a child) might suffer from a latex allergy.
The supermarket's insurers refused to cover the 'risk'.
So truck drivers handling heavy wheels, possibly at roadside, or even straining to remove a wheel from a light van, using a small wheelbrace on power tightened nuts might pull a muscle and sue.
A police officer, perfectly willing to take the risk of jumping into water to rescue someone, drowns so the family sue, etc., etc.
The courts don't help by awarding damages for injuries self-inflicted by stupidity. Man get home (to council house) drunk after, allegedly 10-12 pints. Light over stairs doesn't work so gets ladder and attempts to change bulb. Falls, breaks leg, sues council because light is in an inaccessible place. Court awards £20K damages, reduced by 50% because bloke contributed to the accident through his drunkenness. You couldn't make it up.