Prescott quit in December to become group comms director for BT Europe. WS has now promoted director Jo-Ann Robertson to be its UK head of corporate communications and public affairs.
WS European CEO Colin Byrne said: 'We looked around the market, but decided we had a great potential leader in-house. However, we are looking to strengthen our corporate and public affairs teams with senior outside talent.'
Rod Clayton has been promoted to head of corporate and crisis comms, EMEA.