Huge chunks of cliff plunged into the North Sea at Hopton, just five paces from holiday caravans.
The land-slip last Wednesday took out around 20ft of white fencing, designed to protect holidaymakers from the cliff edge.
And the latest erosion damage has forced Hopton Holiday Village bosses to re-site three caravans - the first of 80 privately-owned sea-view caravans to be affected.
Jonathan Stratford, park general manager, said: 'The caravans are not under threat at the moment but as a manager I have a duty of care to ensure everything is covered. We relocated three caravans and will re-site them once remedial work has been done.'
The sea defences failed last Monday, and further damage on Wednesday saw the caravans moved on Thursday.
'If we did get some significant tides and there was significant erosion they could have been at risk,' admitted Mr Stratford. 'We're carrying out a full survey.
'I spoke to all three owners and they were all understanding about the decision we've made.'
He said the damage shows how urgently sea defence work is needed, after park operators Bourne Leisure publicly blamed the outer harbour for the erosion damage last week.
They are pursuing EastPort UK to fund a £7m sea defence scheme - of three 120m rock headlands - but port bosses say the erosion is not down to the outer harbour.
In the interim £500,000 has been found to fund 5,000 tonnes of rock to shore up the steel and timber revetments.
'At the bottom of the cliffs where it looks weaker, we will shore it up with the rocks,' explained Mr Stratford.
The cash is from Bourne Leisure - £300,000 - and Great Yarmouth Borough Council - £200,000 - with a contractor already lined up.
And while efforts to protect the park continue, further debate has broken out over the cause of the problem.
Mick Castle, borough councillor for Central and Northgate ward, said Bourne Leisure is wrong to accuse the outer harbour of causing sand to shift to Gorleston.
He referred to a £5m bid to build eight granite reefs off the coast of Gorleston to demonstrate the ongoing problem of erosion.
The scheme - designed to protect seawall at Gorleston - was thrown out in 2004 after public objections could not be overcome, blocking access to funding from the Department for Environment, Food and Rural Affairs (Defra).
'I think how it's relevant is that it was before the outer harbour was built,' said Mr Castle. 'It was recognised that as the beach was shallow at Gorleston a very small change makes a massive difference, so even a small amount of wind takes the whole beach out.'
'At the end of the day with the new port, if there's a proven loss of sand off the beach they will replace it, but to blame the outer harbour for a process that precedes it is a joke.'
He said Gorleston beach 'virtually disappeared' in the mid-1980s and around a decade ago fierce tides at Hopton 'took the beach back to reveal 1950s steps at a lower level'.
But people who objected to the rock reef scheme say the situation has changed since then, and believe the outer harbour caused tides to shift.
Dennis Durrant, who spoke against the rock reefs, said he has been 'proven right' in his objections as Gorleston's seawall did not collapse and the beach has grown.
He said his nephew who is a scuba diver has noticed 'confusing currents' around the outer harbour, and that in his lifetime he has never seen Gorleston beach as big as it is now.
'I think the experts have to sort this one out,' he concluded.
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