Ns light's are acting very strange started with dipped beam flashing bright then dull when I got out and looked indicator was stick on and dipped and side were on dimly only affecting ns, I'd I put main beam on all ns front lights go out except constant indicator front side and rear and fog lights won't work on either side at all

 

Checked the earths on the light units? And plugs in the Gem unit in the passenger foot well?

 

I would agree with checking the earths as they can get rusty over time. I would also change the relay for the lights, or you will be doing nothing but changing bulbs.

 

As said, check the earth point, pretty sure it's right underneath the headlamp unit. Not uncommon for the mk2 focus for them to corrode badly there. Also the headlamp multiplug might be wet inside if the seal is missing / damaged.