Mark Webber will no longer take part in the F1 Young Driver Test at Silverstone after Red Bull announced a late change to their planned schedule.

Webber, who will be leaving Formula One to drive for Porsche at the end of the season, was due to test on Thursday afternoon.

Regular team race drivers have been allowed to join this year’s test in order to assist Pirelli with development of their new tyres but this is only on the condition that they run a strictly-defined Pirelli programme that covers two half-days of running. “The teams will have a very clear tyre test programme; they have to run what we tell them to run,” said Pirelli boss Paul Hembery.

Red Bull are keen to evaluate Daniel Ricciardo and with Sebastian Vettel due to test on Friday afternoon, they have decided to alter their testing plan. “Following a clarification of the permitted programmes from Pirelli and the FIA for this week’s Silverstone test, Infiniti Red Bull Racing has revised its driver line up,” the team announced in a press release issued just before the lunch break on Wednesday.

Antonio Felix da Costa, originally scheduled to hand over to Ricciardo for the afternoon, will now test all day today and again on Thursday morning, before Ricciardo takes over.

Carlos Sainz Jr will then test on Friday morning and Sebastian Vettel will take over from him in the afternoon.

Ricciardo will also be testing for Toro Rosso on Thursday morning, right before he switches to the RB9.