Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,372 pages of information and 230,039 images on early companies, their products and the people who designed and built them.
More generally known as 3M
of Wigmore Street, London (UK office).
1929 Public company.
1961 Manufacturers of abrasive papers and cloths, adhesives, scaling compounds, adhesive and sealers, pressure sensitive tapes, magnetic recording tapes, stain repellers, copying products, reflective products and printing products. 2,000 employees. 
The British subsidiary was later known as 3M United Kingdom
1974 Self-adhesive electrical insulating tape introduced known as Scotch 33+.