DB - I don't think you understood what Hihover was saying - a crew wouldn't be authorised specifically to fly in those conditions - they were authorised for low flying - standard 100'agl/10m MSC, got caught by the weather, turned round and resumed. If you end up below your authorised minima, you recover to normal limits asap and report it on return to your authorising officer - as I said earlier, exactly what they did.
Our standard SAROPs auth had no weather limits or minima applied to it, it was at captain's discretion (and that of his crew) how far you pushed into bad weather, it depended on the risk assessment at the time.