No, it's not what you said You said "No the timeclock is there to turn the heating on you don't need a thermostat for that". You're the one making excessive keyboard use.So exactly what I said.
Well done you for getting some use out of your keyboard
Did you think anybody needed telling that?The thermostat turns the heating off when the air temp is reached. If not it'll just keep heating past the desired temp and waste gas.