M 2 R
— 01/03/2020Found on the site of the Jenny Lind Brickworks, adjacent to the Ravenscraig Steelworks, Lanarkshire. Note the ‘2’ is set within a triangle shape. John Bramall has pointed out that this is likely to stand for Morgan Refractories Ltd, a division of Morgan Crucible Ltd. They used a ‘triangle’ emblem as a trademark. Morgan Crucible…