The furthest left top relay is branded Siemens so I guess this is the ful pump one. One terminal is well corroded and it looks like it's got a bit wet over time so I suspect this is the issue. CAF can't get one, you haven't got a spare I can borrow and see if that cures it? I'm pretty much out of money now till payday so can't afford to throw any more money at it. Between me and Lizzie we've spent nearly £1K on our cars this month!!!!
Nick