Not sure of the legality or how it is enforced, but this is what the CVA Completion Statement says :
"As detailed above PFC10 is obligated to make a contribution to the Liquidation which ensures a
dividend of 20 pence in the pound, before costs and expenses, is paid to all unsecured creditors."
EDIT : just found it :
"This obligation will be formalised by way of a binding sales and purchase agreement in consideration of the transfer of the business and assets to the Newco"
( Appendix 1 of the Completion Statement )