Replacement wiper came so I fitted that (fingers rapidly going numb though)
Ford OEM spec is Drivers side 22" & Passenger side 19", which barely covers the screen,
I'm not sure why on earth Ford picked those sizes but basically they are wrong?
I've now fitted Drivers side 24" & Passenger side 22", the blades easily clear each other and I get a bigger area cleaned
Anyway, if you have a mk1/1.5 (newer?) Ford Focus, have a close look at your wipers before buying new stock ones,
you should find a bigger set will fit.
If you want to fix that annoying centre dribble,
then apparently fitting a Drivers side 26" & Passenger side 16" will allow the drivers side to clear the 16" tracks.