When the owners of the Abu Rish family?s garage business need cash in a hurry they get one of their staff in Jerusalem to bundle shekel notes into an empty Pringles crisps carton and shove it to them through a hole in Israel?s separation wall.

?We call it the Palestinian Federal Express,? says Naser Abu Rish, manager of the company?s petrol stations that are located on both sides of the eight-metre high concrete barrier.