My circuit diagram

 This is going to be my reference for wiring, rather than a blog update. However it may be useful for some. 

I've split the wiring into parts, so I'll reference each part below.

Front lights

To be added...

Rear lights

Brake (Green)

Position/tail (Red/Black)

Reverse (Red/green)

Fog (Green/Yellow)

Left indicator (Green/Black)

Right indicator (Green/White)

Fuel pump (Blue/Red)

Black is earth going to two chassis points.

Gauges

1. Illumination positive (red).

2. Temperature gauge signal (blue/black).

3. Common ground to chassis (black).

4. Gauge positive (black/yellow).

5. Oil pressure signal (yellow/red).

6. Rev counter signal (yellow/blue). 

Tell tales

1. Side lights. (red)

2. Main beam. (Red/white)

3. Left indicator. (Green/black)

4. Common ground to chassis. (black)

5. Right indicator. (Green/white)

6. Fog light. (Green/yellow)

1. Battery positive. (Black/Yellow)

2. Brake fluid positive. (Black/Yellow)

3. Battery negative. (White/blue)

4. Brake fluid negative. (Blue/yellow)