You can use this page to search Exploring 20th century London collections in the Museum of London. These drop down searches can be used on their own or in combination with each other.
Choose keyword(s); a "Period", defining the decade in which the object was made; a "Borough" it was associated to or one of the Subjects from the bottom list will help you find the objects you are interested in.
The drop down subjects menu allows you to explore certain aspects of 20th century London life by looking at groups of objects linked by a particular subject such as Bridges, The film industry or Hindu London.