Noise, vibration and a changed pedal feel are your brakes asking for attention, so do not ignore them.
A squealing or grinding noise when you brake
A brake warning light on the dashboard
The vehicle pulling to one side when braking
A brake pedal that feels softer, lower or different underfoot
Longer stopping distances than you are used to
Worn brake pads can also cause an MOT failure. If your brakes feel unsafe, avoid driving and contact 888 so a technician can check them.