As seen in picture two I do have a space to put a footwell bulb holder but I'm not sure whether or not the white socket is what I need, because various guides etc seem to suggest connecting pins, but my socket only has one hole.

Presumably I need some sort of adapter in order to fit some lights ?

It's just a normal focus 2013 zetec I think, most of the guides seem to be using ST.

Are you sure the white connector is for the Footwell lights ?

It looks very much to me like a coaxial aerial socket not a power socket.

15 minutes ago, unofix said:

Are you sure the white connector is for the Footwell lights ?

It looks very much to me like a coaxial aerial socket not a power socket.

Makes more sense to be that  but I can't see anything else. Will look harder - should i be looking for a terminal with 3 pin holes like on other walkthroughs ? 

If and it is a big IF the wiring is there then I'd expect it to only be a 2 pin connector.

https://www.focusfanatics.com/threads/how-to-aftermarket-footwell-lighting.297198/page-2

If not there I suppose as per thread j can tap into a fuse (85 I think it said on there) and wire up my own I suppose 

I tend to agree with @unofixEspecially as that connector appears to have 2 x wires to it, one black, and one black/grey stripe. If it were a light, I'd expect a power feed to be coloured in some way. Perhaps a multimeter to help?