I've just taken my White Knight SensorDry apart (CL447WV), as the heating element has gone, and the wiring was as follows:
1) Incoming live (brown) connected to White with Brown stripe wire
2) Incoming neutral (blue) connected to 2 blues, one of which goes to the over temperature sensor.
3) spare
4) Black with White stripe connected to Grey into a heat resistant sleeve
On the heating element looking from the top, from left to right;
1) Black (which goes to the High/Low switch on the front)
and Grey into a heat resistant sleeve
2) Red (which goes to the High/Low switch on the front)
3 and 4) Light blue to over temperature sensor
HTH, Gary
Gary, January 2005