二十20

When the Benson & Hedges Cup ended in 2002, the ECB needed another one-day competition to fill its place. In response to dwindling crowds and reduced sponsorship, the decision was made to launch a 20 over competition with the aim of boosting the game's popularity, particularly with the younger generation. The intention was to deliver fast-paced, exciting cricket which would be accessible to fans who were put off by the longer versions of the game.

The first Twenty20 Cup was held in 2003 and was marketed with the slogan "I don't like cricket, I love it" – a line from the cricket-themed pop song Dreadlock Holiday by 10cc.

Twenty20 Cup

The first official Twenty20 Cup matches were played on 13 June 2003. The first season of Twenty20 in England was a success, with the Surrey Lions defeating the Warwickshire Bears by nine wickets in the final to win the first Twenty20 Cup Final. On 15 July 2004 Middlesex versus Surrey (the first Twenty20 Cup game to be held at Lord's) attracted a crowd of 26,500, the largest attendance for any county cricket game other than a one-day final since 1953. The tournament saw six different winners in its seven years.

By the end of the 2009, the ECB had decided to implement a larger competition for the T20 format of the game. The Twenty20 English Premier League was a proposed cricket league to be run by the ECB consisting of the 18 county teams and two overseas teams divided into two divisions with promotion and relegation. The proposal was influenced by the success of the Indian Premier League and by Allen Stanford who had organised the Stanford Super Series in the Caribbean. After the collapse of Stanford's series, the proposals were scrapped. Instead a modified 40 over league, the Clydesdale Bank 40 was implemented.

Friends Provident/FriendsLife T20

The Friends Provident T20 (renamed the FriendsLife T20 after just one season) was introduced in 2010. The competition initially divided the eighteen counties into North and South groups, before reverting to the previous model of three divisions of six teams. This period of Twenty20 cricket in England and Wales saw Leicestershire and Hampshire becoming the most successful sides, and in 2013 Northants won their first trophy for two decades.

NatWest T20 Blast

NatWest became the tournament sponsors in 2014, renewing a longstanding relationship the bank had with the county game. The first year of the tournament saw 700,000 spectators attend the games, the most in the competition's history. The tournament was won in 2014 by the Birmingham Bears, Warwickshire County Cricket Club's name for the purposes of Twenty20 cricket, making it the first time a county trophy had been won by a team using a city name. The final victors of this branding of the tournament in 2017 were Notts Outlaws.

Vitality Blast

Vitality became the tournament sponsors in 2018, signing an initial deal to sponsor the competition for four years, with the competition becoming known as the Vitality Blast. The most recent iteration, the 2023 Vitality Blast, was the 20th season of the domestic Twenty20 cricket competition in England and Wales. The tournament started on 20 May 2023 and ended on 15 July 2023, when Somerset were crowned the champions.

There are 18 teams that compete in the tournament, divided into two groups of nine.

Each team plays 14 group games, playing six teams in their group twice (both home and away) and two teams once (one at home, the other away).

The top four teams from each group qualify for the quarter-finals, with the four winners progressing to finals day.