Ok so it has taken me almost a year to get round to it...
I finally changed the fuel filter on the focus
heres what tools I used
2 long flat screw drivers
1 Shallow Offset Ring ring key (spanner) [b]7mm[/b]
1 Large flat LED torch
1 Small LED torch
1 pair of long nose pliers
1 small bowl
After I had the car jacked up and on a axel stand, I flicked the back of the white clip with a long screw driver then after some time and some gentle persuasion with the long screw drivers out came the white plastic retaining clip and then done the same with the one nearest the center of the car, it took a while longer. Then I slackened off the 7mm speed bolt just enough to get the filter moving, and slide it out.
The filter I fitted was a fram, and both ends are straight, but on the original ford filter one end was offset (end going into the center of the car) so I was a bit worried about this but it did not make any diffrence.
Fitting the old filter is the reverse procedure, again the white clip towards the center was a bit fiddely to reinsert, its worth having a look at the clips when you get them out as they only fit in one way but its easy to see when you look at the clip.
I tried to blow through the old filter but I couldnt, tired both ways
just shows how much dirt it had collected.