The West Lancashire derby (sometimes also known as the M55 derby) is a local rivalry in English football between Lancashire clubs Blackpool and Preston North End. The derby has taken place across all four tiers of English football, but not the top flight since the formation of the Premier League. Blackpool were promoted to the Premier League in 2010; Preston North End have yet to reach it. They did not meet in the League between the 2009–10 and 2020–21 seasons, but did so again in the 2021–22 EFL Championship campaign following Blackpool's promotion from the third tier.