Deja vu! Yours truly took this pic for Autosport in 1990…
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.
Adam Cooper's F1 Blog 
I really want this project to be a success. Hope 1st run is more successful than Renault / Red Bull achieved in pre season testing.
Me to
Hopefully one can get a glimpse of the future livery.
Love it. Go McLaren!
As a suffering McLaren fan, any positive news is good news. Regarding any performance, I’ll believe it when I see it. Getting the car to lap without soiling the sheets will be a HUGE accomplishment.
If only it were a V12! This V6 road car relevance is foolishness and a waste. And now Horner is saying go back to V8’s. Good on Honda though for making a come back.