This Manchester Evening News article no doubt based on a press release from the Highways Agency says that:

Bosses at the Highways Agency have launched a crackdown after a staggering 172 sacks of rubbish were collected from the junction at Denton in May.

The two-week clean-up has cost taxpayers more than £8,000. Motorists are now being warned they could face fines of up to £2,500 if they are caught.

The junction, known to motorists as Denton Island, forms a link between J24 on the M60 and J1 of the M67.

Manchester Evening News article