Pirelli is allowed to request teams to assist with its development programme using a current spec car, a clause stating as much is written into its commercial contract with Formula One.
Hembrey:
"In common with other FIA contracts we've had, including the world championship, we can ask the teams if they'd like to perform 1000km of tyre testing with us. It was all done with co-ordination with the FIA, and Mercedes co-ordinated the FIA as other teams have done in the past."
Pirelli and Mercedes-AMG were advised by the FIA that such a development test could be possible if carried out by Pirelli, as opposed to the team that would provide the car and driver, and that such tests would be conditional upon every team being given the same opportunity to test in order to ensure full sporting equity.
Other teams where invited, but only some responded.
It's an ongoing request. We sent a letter last year when we chose the 2010 car saying to the teams ‘by the way we have in our contract 1000km of tyre testing and if you're interested let us know’. Some teams responded to our request, some didn't. We can only do it with teams that have expressed interest.
The problem is the internet is awash with false rumours. As the SKY journo said this was a "secret" test, despite the fact Ferrari and Red Bull knew about it before hand.
A Pirelli spokesman said Ferrari was invited to test and turned down the offer, while Dr Helmut Marko said a Red Bull engineer had also been "informally" asked.
The issues of Mercedes using development parts for added performance is also a bit silly, as you need to know what compound does
what ,
how and
when. Given the teams history of tyres I think some people should know better than assume they would immediately gain an advantage when historically they have struggled, and that's with tyre compounds they know.
Further to this, it has come to light Mercedes only had 10 days warning about the test.
Toto Wolff
There was only ten days between the request and the test, which is not enough time to produce any development parts.
Nikki Lauda
When we were asked to do this, our team boss Ross Brawn called Charlie Whiting and asked if a test is compatible with the sporting regulations. Charlie consulted with the FIA lawyers and gave us the green light. Moreover, Pirelli didn't just ask us, but Red Bull as well.
Bernie Ecclestone was privy to the deal according to some quarters too, but I digress...Whiting represents the FIA, and he authorised it. In which capacity? We will soon find out.