Here's a link to Defender2 on a non start issue. The vehicle would crank but not turn over. It turned out to be a straight forward inexpensive fix in the end.
"It ended up being the cam sensor. Fit a new one and fired up straight away!" Includes a photo of where this yoke is located.
DEFENDER2.NET - View topic - 2011 Defender 2.4 Puma cranks but will not fire.

