[1] Perhaps his most recognisable achievement came in 1956, where he won the 6th RAC Rally driving an Aston Martin DB2.

That same year, Sims finished 65th in the Monte Carlo Rally driving a Riley Pathfinder.

[2][3] Lyndon married Magan P. Shott in 1940 in Crickhowell, Breconshire.

[4] His son, Geoffrey was born in spring 1948 followed by Christopher and Anthony.

This biographical article related to British rallying is a stub.