Anyone know anything about disc brakes?

Riding in this morning in the rain two new and unpleasant symptoms arose. Firstly braking power was vastly diminished and secondly the brakes made a godawful squealing noise - I should think the whole of CS7 heard it.

Sounds like contaminated pads / rotors. Check calipers for leaks. If there are none, take out pads and give them a good clean with disc brake cleaner. Give rotors a good scrub too. If you feel adventurous you can use something abrasive which removes the pad residue and allows you to bed them in again from fresh.

If you find a leak...warantee job.