This room was the old upstairs Kitchen. see next 2 photos for continuation along same wall which is on the Hall (West) side of the room and adjacent to a corridor at the back of the hall. My thoughts are that this could have been a doorway but the photo of Mrs Frost in her kitchen shows it with shelves with pots and bowls.
Long Eaton Grammar School now Mohan Business Centre. Photo from Geoff Carter
Long Eaton Grammar School now Mohan Business Centre. Photo from Geoff Carter