only if your lug pattern is the same. i had to re look up sine i noticed you were from the UK that the focus is different.
so if your lug pattern on the focus is a 5x114 and hte transits are the 5X114 then yes. i would talk with a local tire shop and find out ezactly your specs..... or do a little looing around on the internet
Team Duratec #220/Sedan Revolution #179/NW Posse#5