Hi it could be that the caliper has seized. The front is a two pot caliper and one of them could be seized, hence the warping. And yes replace the pads and rotors, once the issue has been rectified.
How do i tell if the caliper is seized? After going for a test drive I noticed that one caliper is slightly hotter than the other, is that because of the rotor or a seized caliper?
I would say if one rotor is hot than the other and there is more brake dust on the alloy, compared to the other side, you have a seized caliper. Its a fairly common issue.
I removed the wheel today and checked the disc, the inner side has worn away and extra 1.5 mm compared to the outer side which leads me to believe that the caliper is seizing. Also the disc has thickness variations of upto 1.5 mm on each side :S