Single inconsistent clunk coming from rear brake

I’m getting a clunk from my rear passenger side whenever I press the brake pedal down. Happens inconsistently but very often. It doesn’t happen when the car is at a stand still.

I have recently re-greased the brakes, pads have plenty of material left and caliper is new.

I know that my suspension bushings are knackered but I can’t recreate the sound by going over bumps or swerving.

Sounds like your suspension bushes. Did the last MoT have any advisories for any slight movement in the rear suspension?

Only the front suspension bushes came up on MOT. I’m fairly sure the sound is coming from the rear though.

Sounds like the suspension bushes.