Moved into house no thermostat

Hello, we have just moved into a house and we think the sellers took the thermostat.

There are these wires coming from the boiler. Would they be the ones to connect to the thermostat?

Also is the easiest fix just to buy a cheap wired thermostat.

We currently have no heating

Hello, we have just moved into a house and we think the sellers took the thermostat.

There are these wires coming from the boiler. Would they be the ones to connect to the thermostat?

Also is the easiest fix just to buy a cheap wired thermostat.

We currently have no heating