Not entirely, and I know this isn't helpful - but it just started becoming less and less frequent as time went on, and now it comes up maybe once a week (at the worst it was up to 10 times a day).
I didn't do anything conciously, save from rotating my wheels + tires and continually washing my wheels well (and by proximity, the disc and pad assembly).
My pad and discs aren't brand new - going on a 18 months now; and as you can see no one could come up with an answer.
My best guess is that it is either something to do with build-up on the disc or dryness/wetness/moisture on the pads.
Let me know if you have any better luck!
: Red.dot discs (F), Ferodo pads, thermostat, front wishbones, condenser, MAF, Brembo discs (R), Falken tyres
"Because Alfas have flaws, they feel human, as if they have a soul and a temper. Each one — is like the tortured hero of a Russian novel, a car you can never truly fathom, especially when it is 4 in the morning and it is enveloped in a cloud of steam, yet again, on the North Circular."