Slaughter and May, Lovells and Allen & Overy (A&O) have won lead advisory roles on a £1bn bulk annuity deal between Cable & Wireless and Prudential, thought to be the biggest of its kind in the UK to date.

The deal saw the trustees of the Cable & Wireless Superannuation Fund agree to the £1bn buy-in of an insurance policy for its pensioner liabilities with Prudential.