I've just stumbled upon a couple of pics which indicate that Brompton have redesigned the folding pedal:



http://www.brompton.co.uk/uploads/L1113529.jpg

Looks like another step towards the more organic, curved lines of CAD designed parts. Hopefully it'll weigh a little less with some areas cut away, plus the bolt appears to be an allen key fitting on the standard model.
I can't see any evidence that the bearing is replaceable, however.