The Royal London One-Day Cup is a limited-overs cricket tournament in England and Wales, featuring teams from the County Championship. It is played in a 50-over format, where each team faces a maximum of 50 overs to score runs. The competition typically takes place during the summer months and includes both group stages and knockout rounds. The tournament was first introduced in 2014, replacing the CB40 competition. It is sponsored by Royal London, a leading investment and insurance company. The Royal London One-Day Cup provides an opportunity for county teams to showcase their talent and compete for a prestigious title in domestic cricket.