Max Verstappen will take a further 10-place grid penalty at the Canadian Grand Prix, after Toro Rosso elected to change his engine overnight.
The Dutchman, who was already braced for a five-place drop as the result of his collision in Monaco with Romain Grosjean, will now fall a total of 15 places down the order.
Following deliberation among Toro Rosso engineers last night about what to do, and in light of it appearing to be a difficult race for the team, it was decided that a tactical change for a fifth engine would be best timed for here.
Fernando Alonso is also undergoing an engine change after McLaren discovered a power unit issue. But he is still within his allowed allocation so will not suffer a penalty.