Further to my reply further up, just to add emphasis, here is some marketing text re. the DS2500's from Balance Motorsports..
"Ferodo DS2500 is a very popular pad for trackday users and also for outright circuit use on the shorter events. DS2500's chief characteristic is it offers a very high level of friction. DS2500 also offers excellent pedal modulation and feel. DS2500 gives you the confidence to drive accurately and smoothly on track, braking late but safe. DS2500 pads have been a big seller from Balance Motorsport for some time. DS2500 pads are also very driver friendly having excellent pedal modulation and feel. Please remember these pads are not reg 90 approved and therefore any car made later than 2000 should only use these pads on track!"
I believe that Ferodo manufacture a 'performance pad' which IS reg 90 approved and is a milder version of the DS2500.