Shadwell was the founder of the Cambridge Concert Orchestra, and the conductor of the BBC Variety Orchestra, which he held from 1936 - 1967. Charles had four daughters: Joan (1918-2001) a singer who performed under the name Joan Winters; Charles and Joan appeared together in the British feature film Variety Jubilee (1943); Daphne (b. 1927) a director and producer for both BBC and Thames Television; Hazel (b. 1925)an accomplished violinist resides in Bushey, England and Sheila (b. 1923) resides in California.