People who were vaccinated in the US or EU will no longer need to quarantine in England from Monday (August 2).
The change applies to visitors from all amber-rated countries except France, who now only need a PCR test before and after their arrival.
It allows international performers to feature at summer festivals and other events.
"[This] will provide a vital boost to our iconic live music industry as we come out of lockdown," industry collective LIVE said.
Scotland, Wales and Northern Ireland will make their own rules.