I have a Tyre pressure warning failure; ABS Warning and hill start assist unavailable warning.

I have been informed by a Ford dealer that I need new wheel bearing hubs on the rear wheels.

Any ideas?

I would guess that this is an ABS issue. Without knowing if any DTC's exist it's difficult to be more precise.

The rear wheel bearings are the full hub with the abs sensor incorporated. If the bearing is Defective the mechanic could be correct. But both 2 go at the same time is strange. I would get codes checked or get a second opinion before forking out for all that. 

I find it very hard to belive that 2 would go at the same time. More likely a faulty connector all 3 faults you are reporting are related. Get ForScan connected up and see whats in DTC

I have this error come up on my 2011 Cmax too.  At first it was intermittent after a really wet day back in the summer.  Now it comes on every time I start (not sure if it's connected but my car was recently washed).  I had two new tyres back in the summer before it's MOT and they were recently checked/inflated.  There is no issue with the tyres or how the car drives.  I've wondered if it was an issue with the sensor as when it's dry for a while it didn't do it.