Marshall and Co (of Clayton)
From Graces Guide
of Belsize Works, Clayton, Manchester
1897 Produced first cars - these were called Marshalls and were very similar to the French Hurtu, itself a Benz replica.
Agencies were established in London and Dublin and the car gained a Gold Medal for efficiency at the 1899 London exhibition.
1900 Showed motorcar and makes carriages of all types. Paris Exhibition 
1901 A new more modern four seat model appeared in 1901 with twin cylinder engine made by Buchet and was the first to carry the Belsize name as the "Marshall Belsize", taking its name from their Belsize works where they had built bicycles
1901 Belsize Motors was formed in Clayton, Manchester.
1903 The company name was changed to Belsize Motors and Engineering.