I need to replace my old honeywell room thermostat and have bought a new one from wickes to replace it with.
On the old therm. the wiring is as follows.
1-Live 4-N/A 3-earth 2-Neutral 5-N/A

On the new thermostat there are only 3 teminals but there is one directly on the switch itself. I am guessing this is for the earth, but i need to know for sure the exact wiring.

Thanks ops: