What wire do I will need to match space thermostat for mix boiler?

Qusetions: i've halstead 102 combi boiler and I wish to set up space thermostat but I don,t understand what wire I must buy to go from boiler to space thermostat

Answers:Twin and earth one.02mm is very good (earth not commonly required) for those who are fitting a battery driven digital thermostat or programmable thermostat. for those who are fitting a mains driven stat it should have an anticipator from the circuit and also a neutral connection will likely be necessary for right operation, so that you will will need three core and earth (earth conductor not req.)

Answers:1mm twin and earth must do it.