Pabs site implies that the old cars had it but the new don't:
'Probably one of the most useful modifications to the Cupra is the bonnet seal modification. Earlier cupras came with this already installed, so it is wise to check that’s yours hasn’t already got it before you go any further. It decreases the amount of dirt, water and rubbish that get into the engine bay.'
Mine's an 04MY so I will check when it arrives.