Thanks Drew,
My suspicion - but it can only be that - is that this is something fairly simple, and may be affected by braking, rather than caused by braking.
Flapping noise:- loose plastic undershield ?? Complete guess, but….
Kind regards,
Gareth.
You'd think a loose caliper etc would have been picked up once brake were changed.
Could it be a wheel bearing (even though this would be a rumbling sound normally) or a driveshaft issue?
I'm assuming tyres have been checked too.