Presumably you would be sitting on/reporting to the Executive Board, rather than the plc board.
So, get off your backside, do some thinking, and check the details of the renumeration packages paid to Exec Board members that will be contained in the annual financial report (as such details are always reported to the LSE).
That could, like, er, give you a ballpark of your peers or immediate superiors.
Your lack of drive to find the answers for yourself and/or ignorance of listed companies is astonishing. If you truly have been approached then you'll be out of your depth, based on this evidence anyway.