Update:
I took the switch out of the layout and still nothing, so I checked voltages around the circuit (board 2).
Here's a link to the schematic - https://i198.photobucket.com/albums/aa159/Mushro/deOK_zpsfdc7f3d3.png
I've got readings right up to the last two 100nf caps and nothing beyond.
Most of the readings after the first 10k resistor are either 1.10v or 0.61v (the battery is actually putting out around 8.5v) - would I be better off wiring in a 9v power supply? (is that the mistake, perhaps?).