S60 D3 not starting - please help!

[Cozza]

Hi folks,
My 2011 S60 D3, 33k on the clock and full history, decided to start playing up on Saturday by not starting. Other than taking 3 attempts to start on Friday (never done that before) it had been fine.
The AA guy had a look at it for about an hour, tried all of the fuses, plugged in diagnostics but found nothing. My car was then towed home.
I had a gut feeling that it might be related to fuel so changed the fuel filter. There was fuel sitting in the filter housing (now on the road - oops)! Unfortunately the car still won't start.
Last night I roped a couple of folk into helping me. We discovered that the fuel filter bowl was bone dry indicating that there's no fuel getting drawn from the tank. (The fuel gauge is showing about a quarter full).
So our thoughts are that the in-tank pump or control unit is goosed and we believe the tank has to be dropped to get at it - joy!
Does anybody have any experience of this or a wiring diagram for this area of the car?
All inputs/hints/tips/advice would be VERY gratefully received!