Nest 3rd Gen to Ideal logic combi c35

[CashFox]

Hi, I am looking to link a 3rd gen nest to my ideal logic c35 boiler. I have wired the Heatlink to the boiler and the mains, however, I believe there is an issue somewhere. The Google thermostat (not wired into mains, voltage too high) is connecting to the Heatlink and it seems to be sending a demand to the boiler (sound of ignition etc) but the boiler doesn't seem to be pushing this out to the radiators. I imagine there is an issue with the way I have configured the wiring. Here are some photos.

Old setup (the mains seems to be doubled up with the previous thermostat in the connector)

Heatlink

 Boiler

 Any advice is appreciated.

[Frustratedddd]

I assume L & N are your feed from a fused spur - correct?

Where do terminals 2 & 3 go to?

Whats that green wire hanging to the left of the picture?????????????????????????????