The 1971 Embassy British Indoor Championships was a combined men's and women's Grand Prix tennis tournament played on indoor carpet courts. The event was categorized as a B Class tournament and was the 4th edition of the British Indoor Championships in the Open era. The tournament took place at the Wembley Arena in London in England and ran from 23 October through 30 October 1971.[1]
The men's singles event was won by unseeded Ilie Năstase who received 30 Grand Prix ranking points for his tournament victory. Billie Jean King won the women's singles title.[2]
Ilie Năstase defeated 
Rod Laver 3–6, 6–3, 3–6, 6–4, 6–4
Billie Jean King defeated 
Françoise Dürr 6–1, 5–7, 7–5
Bob Hewitt / Frew McMillan defeated Bill Bowrey / Owen Davidson 7–5, 9–7, 6–2
Françoise Dürr / 
Virginia Wade defeated Evonne Goolagong / Julie Heldman 3–6, 7–5, 6–3