The engine coolant needs to reach operating temp asap for max efficiency.Your thermostat looks suspect.Unfortunately, in common with a lot of modern day cars ,the stat is incorporated into a plastic housing and is not re-newable as a seperate part. You could try a local motor factor to seeif an alternative part is available.

Thanks for the reply.I also get a slight ticking on start-up sometimes would that be the thermostat also

No. That will be the tappets. Solid on the 1.6 Focus engine and need checking and shimming (iif necessary) every (from memory) 60,000 miles. Easy to check, a pig to shim unles you have the Ford tool and a box of shims.

If its only slight don't bother.

But sometimes an injector can make a tapping/ticking noise on startup as well. Can be difficult to tell which it is.