I believe that this leaked phone WAS McLaren, which was Cancelled. I do NOT believe that this is a leak of the 1030. The McLaren from what has been said was to be a 3d touch interface focused phone, not a camera centric phone. Tom Warren said that this leaked phone did not have a 50mp camera, but more in the range of 20ish which would line up with what we do know about the McLaren.
The OS is an older build, even the design language of the phone is of an older style (think 920,1020,1520) not the newer design language of the 930,830.
I think we might see a 1030 sometime next year, although I would not be surprised if it follows the next generation series into the xx40 line.
Kinda disappointed, but it is, what it is.