I grew up in London where my mom danced for the Royal Ballet.
Awesome.  The Royal Ballet in internationally known. A very top notch ballet company.
Yes, she used to have to go to practice daily..
It's been around since 1931.  In watch years did your mom dance for The Royal Ballet?
The Royal Ballet
Ah yes... Perhaps she danced around the time The Royal Ballet got its charter in 1956.
She danced for them between 1988 and 1990.
, and continues to be one of the world's most famous ballet companies to this day, generally noted for its artistic and creative values. The company employs approximately 100 dancers and has purpose built facilities within the Royal Opera House. The official associate school of the company is the Royal Ballet School, and it also has a sister company, the Birmingham Royal Ballet, which operates independently. The Prima ballerina assoluta of the Royal Ballet is the late Dame Margot Fonteyn.
History.
In 1926, the Irish-born
the Vic-Wells (later the Royal Ballet) in 1931 with 6 salaried dancers. International Ballet and the Festival Ballet were years away. Britain's best known dancers Alicia Markova and Anton Dolin had been in England since the collapse of Ballets Russes but had no large scale company to dance for. In 1930 serious professional ballet in London was at a low point and in the rest of the country was non-existent. 
Formation.
The Camargo Society was conceived by Arnold Haskell (ballet critic and prolific author)