Split CV gaitor with chirping & brake judder

[Mr_Orange]

The car had that corner wheel bearing replaced just before I bought it which is when I'm guessing the d.shaft damage was done.  I'm wondering now if there is an underlying problem somewhere: 

What if caliper is seized (hence distorted disc)? 
Is disc runout and the chirping noise associated with a poorly fitted wheel bearing?
Would anything related to these symptoms have stressed the CV joint, damaging that?

BTW Chirping noise disappears under braking, with "feedback" under braking through the car.

f u r k i t

[Mr_Orange]

Its round at the garage now.

Just shy of 2 weeks ownership and I'm hit with this!   

CV Gaitor is definitely shot - wheel is covered in grease!

If the wheel does not freely spin when raised off ground is chirping noise in motion a knackered disc or other issue such as driveshaft CV or bearing?  Would ABS affect this spinning?

Bearing was replaced 600/700 miles ago.

Any experience/knowledge/guidance appreciated!