Rupert Clarke, Hermes property head, is to become acting chief executive for the whole group.

Clarke is to replace Mark Anson who is returning to the US for family reasons, where he will take up a senior position with a leading investment management firm, based in Chicago, from September.

Ex-Jones Lang LaSalle man Clarke follows Alastair Ross Goobey in stepping up from property to a group role.

A statement today said ‘until his successor has been appointed, the firm will be run by the Executive Committee, led by Rupert Clarke.’

But sources suggest Clarke could be well placed to take on the role full time. If he does a new property head will be needed.

Richard Bernays, chairman of Hermes Pensions Management, said: ‘Mark has made a significant contribution to Hermes since he joined at the beginning of last year. We understand the family reasons that require him to return to the US and we wish him and his family well.’