That's widely known, your source has just seen what the Peterborough owner said on a podcast; it was also reported by Sam Byrne.

"Interesting from Peterborough Utd chairman Darragh MacAnthony, on #StockportCounty record signing Malik Mothersille:

'Malik was offered the same money to stay as he was to go. He didn't want to stay. Charlton had been bidding for Malik, but they couldn't do the deal we wanted, and they went in for the lad from Stockport.'

'Mark (Stott), great guy, I did the Sam Hughes deal with him and Simon (Wilson), and Mark asked on that call about Malik.'

'I said 'sure, this is what we want'. Chelsea had a sell-on and there was a net figure I wouldn't go below. We've got a great relationship with Stockport, we let them talk to him, and to be fair to Mark and Simon at Stockport, Malik initially wanted the Championship, but they sold their project to him.'

'We feel we've got good value for Malik, and good value in the future for him as well. We wish him and his family the best; if he feels that Stockport - a great club, doing wonderfully - is a better fit for him, that is his prerogative.'"

https://x.com/_SByrne/status/1941066699542868396?t=hqqlNNMY2mny_rSdFKDPoA&s=19