Alli resigned from Chorion in Augustafter the business failed to renegotiate banking deals to alleviate its debts.
Chorion currently has a total of about £70 million in debt, and interest payments are likely to rise from £31m to £35m next year, an unmanageable amount.
The deal with Silvergate marks the first sale of the company's properties, which include Mr. Men and Little Miss, Paddington, Olivia, Agatha Christie and Raymond Chandler.
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