Claim: During the 1983 English Greyhound Derby held at White City Stadium (which was built for the 1908 Summer Olympics), I'm Slippy, trained by Barbara Tompkins, placed 1st.
Evidence: White City Stadium Built for the 1908 Summer Olympics, it hosted the finish of the first modern marathon and other sports like swimming, speedway, boxing, show jumping, athletics, stock car racing, concerts and a match at the 1966 World Cup. The winner was I'm Slippy and the winning owner John Quinn received £25,000. 
I'm Slippy Position White City Stadium Built for the 1908 Summer Olympics, it hosted the finish of the first modern marathon and other sports like swimming, speedway, boxing, show jumping, athletics, stock car racing, concerts and a match at the 1966 World Cup.