Whether it was through a mischievous hack or some clumsy release management by a third party, the MP4-31 was out there for everyone to see before the team's official press release.
McLaren-Honda have now revealed details of its 2016 MP4-31 challenger.
"The striking and innovative MP4-31 chassis integrates the new Honda RA616H power unit, developed exclusively for the team.
"Although a high level of continuity in Formula 1’s technical regulations has enabled the team to strengthen and mature many of the design concepts developed on last year’s McLaren-Honda MP4-30, the new car also incorporates a significant number of all-new innovations. The result is a balance of remarkably elegant aerodynamic solutions with a highly space-efficient integration of Honda’s new-for-2016 power unit.
"While McLaren’s race team has spent an extremely busy few months developing the MP4-31 right up to the very tight deadline dictated by the truncated modern off-season, its marketing team has also enjoyed a very strong winter, announcing a raft of prestigious new commercial deals to add to a roster of equally valued existing partners."
McLaren-Honda also revealed a series of new partners which are now associated with the Woking outfit.
"Joining McLaren-Honda’s partner group for 2016 will be the world-renowned luxury watch brand Richard Mille, which commences a 10-year marketing, branding and licensing collaboration.
"Global luxury goods giant LVMH will continue its long unbroken association with the team, through its premium sparkling wine brand Chandon, whose rising-star identity will adorn both the MP4-31 and the drivers’ race suits."
VIDEO: Mercedes W07 on track at Silverstone
GALLERY: First pictures of the FW38
Check out Red Bull Racing's 2016 livery
Key dates for the 2016 F1 season
Keep up to date with all the F1 news via Facebook and Twitter