Mr Leighton, former Asda chief executive, was called in to conduct a strategic review of Pace in June last year after a series of profits warnings.
Chief executive Neil Gaydon and finance director Stuart Hall were the highest- profile casualties of the revamp.
The review prioritised transforming the group’s core economics to improve profits, building on its position as a world-leader in payTV hardware, and widening out into software, services and integrated solutions.