Morrisons is expected to update the City on its progress in finding a fourth non-executive director this week.

Last month the supermarket group appointed Nigel Robertson, Brian Flanagan and Susan Murray as non-executives and said that it expected to appoint a fourth within the next four weeks.

Morrisons deputy chairman, David Jones, is leading the search after Sir Ken Morrison, Morrisons chairman, promised shareholders at its annual general meeting in May that it would appoint four new non-executives.