F1 will use the new construction of Pirelli rear tyre at the British Grand Prix and for the remainder of the season after the switch was approved by the World Motor Sport Council.
The WMSC met earlier on Thursday [July 8] where the ratification was given to introduce the tyres that were tested during free practice for the Austrian Grand Prix.
Pirelli provided teams with more robust constructions as an added step of precaution in the wake of the tyre failures suffered by Lance Stroll and Max Verstappen at the Azerbaijan Grand Prix.
After the testing process, Pirelli motorsport boss Mario Isola said: "I didn't have any objections, I didn't have any negative comments, I didn't collect anything that has taken me to think there is no good reason not to introduce the prototype at Silverstone."
The WMSC also approved various updates to the 2021 sporting regulations relating to the inaugural sprint qualifying event, also at Silverstone.
The initiative, which will be trialled for the first of three occasions in Britain, will see the traditional qualifying format moved to Friday evening and a 100km sprint qualifying race taking place on Saturday to determine the grid for the main race on Sunday.
The updates made will include tyre allocation, for example, with drivers and teams not obliged to start either of the two races on the tyre compound used in Q2 of Friday's qualifying session.