Born in Pudsey, Yorkshire, Leng was U-19 captain for England Women and first played for the senior squad in a One-day International in 1995. In April 1999, Leng played for Yorkshire Bank first team in the Bradford Cricket League, the first woman to play in that league, and became the first woman to play inter UCCE cricket in 2001. She was dropped from England's one-day squad in 2002 after taking an unauthorized holiday in Tenerife. Although she was recalled for the 2003 tour for Australia, her last Test match, as of 2006, was in February 2003. Her highest test score came in 1996, with 144 against New Zealand.