The term 'stroller, in London' can be solved by the crossword solution 'PRAM'. A PRAM is a type of stroller that is commonly used in the United Kingdom and other parts of Europe. It is a four-wheeled vehicle designed to transport a baby or young child. Prams are typically made of lightweight materials and feature a hood or canopy to protect the child from the elements. They are often used for leisurely strolls around town or in parks.