Lucia in London (1927)

Lucia in London (also known as Make Way for Lucia, Part II) is the third book in the Mapp and Lucia series.

Synopsys
Using her best social-climbing instincts and refusing to be embarrassed, Lucia sets out to conquer London and mingle with the beau monde. Soon a secret group of "Luciaphiles" springs up; the social climbers who make up its rank never tire of watching her get into and out of all kinds of trouble.