Eric Boullier revealed some time ago that the interim MP4-29 would be given the ‘H’ designation.
The team said via Twitter: “Getting set for Silverstone tomorrow for a filming day. We’ll be parading the interim Honda-engined MP4-29H/1X1 & 2 classic McLaren-Hondas.”
Stoffel Vandoorne will be at Silvesrtone, but is only scheduled to drive the older cars.
The team is obviously now on course to run the car at the Abu Dhabi test on the Tuesday and Wednesday after the Grand Prix, although it remains to be seen who might drive there.