Lascelles
© Ken Hawley Collection Trust - K.0528
Lascelles was a brand name created as part of a Black Cat cigarettes coupon promotion, for the Carreras Tobacco Company, which ran between the late 1920s and early 1930s.
The knife was made by the Sheffield Silver Plate & Cutlery Company (1923) Ltd.
See also https://jannaludlow.co.uk/Art_Deco/Black_Cat_Factory_info.html for more information about Carreras and the Black Cat Factory in London.