Installing Tado V3+ - Firebird Oil Condenser

I’m looking to install a Tado V3 to replace my existing boiler controls. It’s currently using an apt timer for control and it’s a bit dated.

It’s a Firebird Envirogreen 20-26kwh Boilerhouse model. Has any one got experience of wiring up a Firebird boiler?

I’d attach pictures but I can’t see how.