Pirelli has now issued a formal statement confirming its intention to give each driver two sets of ‘experimental’ tyres for the Friday of the Canadian GP.
It confirms that the intention is to race them from Silverstone. The statement reads as follows:
The Formula One teams will have an opportunity to test the new range of Pirelli P Zero tyres during free practice at the Canadian Grand Prix, while the tyres used for the actual race will remain in their original 2013 specification.
In order to provide some testing time before any new range of tyres is introduced, the P Zero White medium and P Zero Red supersoft for Canada will be in exactly the same specification as that which the teams started the season, with no adjustments.
This new tyre will be brought to Canada as an experimental tyre for free practice, as allowed by the current regulations. Each driver will receive two sets of this new medium compound for use during Friday’s two sessions only.
Following feedback from the teams and drivers, the new specification of tyre is then set to be introduced from the British Grand Prix at the end of June, and will remain in place until the end of the year.
The aim of introducing the new tyre is to prevent any instances of the tread detaching itself from the structure. However, the performance and wear characteristics of the new tyre will not be significantly different, with the aim of keeping up the spectacle and retaining a strategic element to all the races.
Adam Cooper F1 
“However, the performance and wear characteristics of the new tyre will not be significantly different, with the aim of limiting F1 to a pure strategic tyre management event, not race, and annoying those teams who complained about the tyres to begin with.”
😉
And also annoying the fans who part with hard earned wedge to watch these processions. Moto GP anybody?