Mountains of waste has been shifted onto an illegal dump partly owned by King Charles as new footage reveals huge activity at the site.
Footage by drones appears to capture two excavators dumping rubbish from one area of the Wigan site to land belonging to the Duchy of Lancaster.
The Greater Manchester tip - which has been labelled the worst illegal waste dump in Britain - holds more than 25,000 tonnes of rotting rubbish, all within yards of residential homes and primary schools.
The rubbish tipping comes only weeks after it emerged last month that a significant area of the site was owned by the Monarch through the Duchy of Lancaster estate.
Residents close to the site said they were previously assured it was secure after a major criminal investigation by the Environment Agency; however, the new footage captured by Channel 4 News has raised questions that the site is still active.
In response, new petition created by residents demanding the Monarch clear the site has now reached 20,000 signatures.
Wigan resident Nicha Rowson, who lives less than 100 metres from the rat-infested waste site, is also writing a letter to the King urging him to take action.
So far, the Duchy has offered to 'hand over the land' to Wigan Council, but it maintains it has no responsibility to help clean it up, insisting only 30 per cent of the land is vested with the King's estate.
However, the Environment Agency has countered this, stating the Duchy owns the 'majority parcel' of the illegal dump.
If the Duchy handed the land to Wigan Council, the King would give the clean-up bill, running into millions, to the taxpayer.
Josh Simons MP, the MP for Makerfield and Parliamentary Secretary for the Cabinet Office has previously said the Duchy 'seems to be getting off scot-free' adding that it has a 'moral obligation' to help clear the illegal dump.
A spokesperson for The Duchy of Lancaster told Channel 4 News 'the Duchy remains fully committed to working with Wigan Council and the Environment Agency to address this issue and to counter the impact of illegal waste tipping.'
Baroness Sheehan, Chair of the House of Lords Environment Committee, said: 'Well, I am gob smacked really and, when I saw it, it was just so filthy and so horrible, it's a living nightmare for the residents and it just seems as though there's no end in sight.
'That there is now new activity being seen there. It's just awful for them.
'My message to the EA is that they really need to urgently clear this site because it is going to attract new activity.
'They need to clear the site, they need to secure the site thereafter. I do think CCTV would be a good deterrent - if they can get one up that's effective.
'It does shock me given the history of the site, given what's already there and given that we know that the waste criminals who operate sites like this are unscrupulous actually and they will do anything for more money.'
The Environment Agency said: 'We have taken robust action at this site, including launching a major criminal investigation and interviewing individuals under caution.
'A series of interventions have already been made to ensure there has been no additional waste dumped illegally.
'As this is an active criminal investigation, we are unable to comment on specifics of the site.'