She will become an independent non-executive director of the UK commercial property investment group in January.

Currently senior independent director, O’Byrne will take over as chair of the energy company from Scott Wheway.

Moni Mannings joins the UK commercial property investment giant as a NED and senior independent director designate.

Sir Ian Cheshire will step down from the board of BT Group in order to take over as Landsec’s chair from Cressida Hogg CBE.