William Martingell was born at Nutfield, Surrey, in 1818 and made his first-class debut in 1839. A right-arm medium-fast roundarm bowler who could also bat usefully, he was a regular in the Surrey side through the 1840s and early 1850s, taking 659 first-class wickets at 14.96 across 195 matches. His best performance was 8 for 53 for Surrey against Nottinghamshire at Trent Bridge in 1850. When Wisden and Dean formed the UAEE in August 1852, Martingell was among the southerners they recruited; his membership confirmed that the new body was not merely a personal vehicle for two malcontents but a genuine professional alternative. Clarke blackballed him from AEE matches as a result. Martingell continued to play for the UAEE through the 1850s alongside his regular Surrey duties, and was a key figure in Surrey's champion county years. He retired in 1865 and died at Nutfield in 1897, aged 78.