02 Focus

[Oxygen Thief]

One of the girls I work with has a 02 Focus, lately the needle on the speedo has been behaving erratically. Whilst at motorway speeds dropping down to 30 and whilst sat at a stand still saying she's doing 120.
Also the fuel gage sometimes reads empty when it has a full tank.
So, is this an easy fix or a complete nightmare?

[AshBaldry]

This is a well known problem,has been on Watchdog! Not sure on the fix but I think a new clock set was/is required