‘Sea’s End House,’ says one of the men, stopping to rest his back.

‘Doesn’t that MP live there?’ asks another.

The woman has stopped at the far side of the bay and is looking across at the house. The battlements are dark grey, almost black, in the fading light.

‘Jack Hastings,’ she says. ‘He’s an MEP.’

Although the woman is the youngest of the four and has a distinctly alternative look – purple spiky hair, piercings and an army surplus jacket – the others seem to treat her with respect. Now one of the men says, almost pleadingly, ‘Don’t you think we should knock off, Trace?’

The man holding the staff, a bald giant known as Irish Ted, adds, ‘There’s a good pub here. The Sea’s End.’

The other men stifle smiles. Ted is famous for knowing every pub in Norfolk, no mean feat in a county reputed to have a pub for every day of the year.

‘Let’s just walk this beach,’ says Trace, getting out a camera. ‘We can take some GPS readings.’

‘Erosion’s bad here,’ says Ted. ‘I’ve been reading about it. Sea’s End House has been declared unsafe. Jack Hastings is in a right old two and eight. Keeps ranting on about an Englishman’s home being his castle.’

They all look up at the grey house on the cliff. The curved wall of the tower is only two or three feet from the precipice. The remains of a fence hang crazily in midair.

‘There was a whole garden at the back of the house once. Summer house, the lot,’ says Craig, one of the men. ‘My granddad used to do the gardening.’

‘Beach has silted up too,’ says Trace. ‘That big storm in February has shifted a lot of stone.’

They all look towards the narrow beach. Below the cliffs, banks of pebbles form a shelf which then falls steeply into the sea. It’s an inhospitable place, hard to imagine families picnicking here, children with buckets and spades, sun-bathing adults.