Have you done an air path calibration? The ECM calculates the MAF values during the calibration. Not doing a calibration will give MAF read variations, which the calibration irons out.

Black smoke you say check the little hose connected to to the throttle body for a split, if that is ok check the lower hose going to the intercooler on the same route. The MAF would most likely cause a limp home mode, if it was that much out. 1

I now use Advanced Factors, after being recommended to them on here. Good products and good prices. https://www.advancedfactors.co.uk/land-rover-freelander-2-l359-2006-2014-4-c Depending on its history, you probably ought to also do the fuel...

Did you also change the power steering reservoir, it as a built in filter which cannot be changed, so could be restricting the flow of fluid? they are cheap enough.

Managed to get it off with a 14mm spark plug socket, all sorted now👍

I have looked at the started, and to be fair I'm not confident it's any good. I have taken it out and shorted it and not firing, so next on the checklist is a new starter. Will keep you posted. Thanks

Before you buy anything two things to do 1: try smacking the starter with a hammer to see if it unsticks 2: the battery cables have nuts and bolts on them where other cables connect to the main battery cables make sure they are not loose and are...

As above. You've got to remove the strut to access the top mount. Technically it's possible, but as the strut is secured to hub assembly by just 2 bolts, it's not worth messing about trying to get enough space with the strut in place.

No it only comes out from below.

Spray some silicone lube on the pedal bushings, which have probably gone sticky.