There is only one standard of care, but DEFRA wrote two for every situation they could imagine.
There is no evidence that anyone took their duty of care seriously: Because we have pages of nonsensical regulations that were foisted onto our industry by the self-serving CFSG and the idiocrats working for DEFRA.
If you base a regulation on common sense there would be a genuine route for justification But we have dozens of double-standards that DEFRA imposed on the workforce that were solely created to justify the rating system.
DEFRA couldn't identify any animal welfare issues so imagined every possibility. Then DEFRA lost sight of the objective because they set about inventing an almost surreal set of "either, or" double-standards for every aspect of every regulation. DEFRA can't even show that there had been a decline in cat welfare and don't have any argument to justify more than one standard of animal welfare.
DEFRA created options so functionally inept and pointlessly arbitrary that if one of these idiots had heard that vetinerary nurse sometimes wear crocs they would have written two paragraphs with alternative standards determining the workplace footwear policy for an entire industry.