Last night it definitely looked as if the problem was specific to BM: other sites I visit frequently like Facebook, the BBC, BMW club etc were loading as normal.
FB is US based and the BBC is UK based. Did you try any other sites hosted in Holland? As Matt wasn't having any trouble over there, and not everybody over here was having trouble, I'd suspect the problem was with a link from here to Holland.
My ISP is Virgin supplied via their own fibre-optic cable rather than a BT line, btw.
Good bit of marketing there by Virgin, the cable into your house is probably coax (mine is). They use fibre for their national network, but then so do BT. Virgin have recently started offering fibre to the home, but then so have BT.