So after building this filter twice it appears the problem was the LM13700 from eBay.
After purchasing Texas Instrument ones from R/S Components in the UK the circuit is working. (Apart from the LED’s don’t light up and the resonance is weak)
I got my money back on the cheap eBay ones.
As a warning to others, here is a picture of the dodgy chips.
The label reads 07JMLIRC3 LM13700N
