[2] run by the England and Wales Cricket Board (ECB), that was branded as the Vitality Blast due to the tournament's sponsorship deal.
[4] In June 2021, Samit Patel, playing for the Notts Outlaws, became the first English player to do the double in T20 cricket of taking 250 wickets and scoring 5,000 runs.
[5][6] In July 2021, Derbyshire's match against Essex in the 2021 County Championship was abandoned before the start of day two due to a positive COVID-19 case in the squad.
[7] As a result, Derbyshire's final two T20 Blast group-stage games, against the Northants Steelbacks and the Yorkshire Vikings, were also cancelled.
[20] The Hampshire Hawks reached the Finals Day, after they knocked out defending champions the Notts Outlaws in the second quarter-final match.