 | This article lacks an overview of its topic. (March 2024) |
 | This article appears to be slanted towards recent events. (March 2024) |
| Countries |  England |
|---|---|
| Administrator | England and Wales Cricket Board |
| Format | Limited overs cricket |
| First edition | 1969 |
| Latest edition | 2009 |
| Number of teams | 18 (2 leagues of 9) |
| Current champion | Sussex |
| Most successful | Essex, Kent, Lancashire (5 titles each) |
| Website | ECB Natwest Pro40 website |
The NatWest Pro40 League was a one-day cricket league for first-class cricket counties in England and Wales. It was inaugurated in 1999, but was essentially the old Sunday League retitled to reflect large numbers of matches being played on days other than Sunday.