Started Sunday's trackday at Donington everything fine. As the day progressed my brakes became worse and worse, juddering until the car was not drivable towards the end on the day. Now on the road I can brake from high speeds numerous times getting the brakes hot with no judder what so ever. Anyone else ever experienced anything similar

Maybe it was just you leg shaking from too much adrenaline lol

They probably just got too hot at Donny. I doubt you'd get the same temperatures on the road even driving like wellformed

its un-even pad transfer,read this!

The pads were new RS14 earlier in the week and the bedding in process had been followed. If it was uneven pad transfer then surley it would be still juddering now

What kind of discs are they?

If you were braking very hard at Donny,it could well have been you ABS.

They are Brembo discs.
It definatly wasn't the ABS

They can de-warp, yes.

This is what I suspect has happened. Problem is next time I do a trackday will the warp again?

Not if you take care when cooling down, and don't stand still pressing your pads onto glowing disc's..