She was an umpire between 1972 and 1999, and had a natural authority as well as making good use of humour to defuse potentially awkward situations.
She helped with the development of the Association of Cricket Umpires and Scorers, and in 1975 she was the first woman to be elected to its general council.
[1] According to Robert Griffiths QC, who chaired the committee, "Sheila combined an analytical mind of a natural logician and conceptual thinker with a deep understanding of the role of a legislator.
"[2] In 1999, amid great media attention, she was one of the first ten women granted honorary MCC membership, entitling her to enter the Lord's pavilion and its Long Room.
She went to St Paul's Girls' School in London in 1959 as head of mathematics, where she was an inspirational teacher for three decades.