My front & rear washers have suddenly stopped working, so l guess its either the Fuse or Pump thats the problem. ...

Id say in France.
Try and find a manual online or if you've got your glovebox manual have a look in there.

fuse box is where ive always found the fuses not hard to look or pull each and everyone takes about 5 minutes really easy to check by looking at them and most all fuse boxes over drivers left foot

Do not rule out the fact that the problem could be ur ''stalk'' switch on the steering column. These often go bad after 10 years. Inside the stalk r delicate switches & contact points. You cannot repair them, l have tried.

Try adding 12 volts directly to the washer pump motor. MIND the correct positive & negative current for 12 volt direct current! The motor should humm & pump immediately. This proves ur stalk switch is bad.

Windscreen washer pump motor..there r 3 of these. Front, Rear & a front/rear motor. there is also a headlight sprayer pump motor for deluxe models.
.the fuse is number..maybe? fuse 26...30 amperes

Hmm .. l see a difference in cars with Automatic or 5 speed transmissions. l see a difference in cars made in Australia & Europe. l see the serial number of ur car may make a difference in the fuse number.
visit this site & check the different years of PEUGEOT FUSES..serial numbers..
http://peugeotlogic.com/fuses/fuses306/fuselist9.htm

l hope u have used washer fluid anitfreeze??