Worked hard, nailed it - Took exam - 80%
Thanks for your help everyone.
The method I was taught just before the exam is as follows.
1 - Set wind on index
2 - Set blue circle on 0 on bottom part of the scale
3 - Draw a dot for the wind
4 - Set Track
5 - Draw a straight line downwards from the dot - a few cm. Ensuring it's straight and parallel to other lines.
6 - Set blue circle on TAS
7 - "Twist" the wheel round until the line is in line with the other lines ( Makes sense?
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This is accurate to a few degrees so it cannot be used for exact measurements. More of a double check to ensure you're going the right way and are roughly in the right area.