That's all it was. Both bulbs were blown, which is a bit strange. I replaced them this morning and it all works again .
'98.5 Contour SE - Zetec Powered '00 Focus SE rims with Toyo FZ4's Rickbrook Shifter Knob Bullit Gas Door Accel Coil with Ford Racing Wires KVR Cross Drilled Rotors with KVR Carbon Fibre Pads