Disco 2 Crank and no start.....one off ?

Yesterday I had a 20 mile trip into town. Had just under 1/4 tank so quickly stuck £15 in at BP garage.
Drove into town, sat there for 40-60 mins, fired back up and drove back.
Sat for another 60 mins or so, turned the ignition.....crank, no fire. Waited a minute, tried again, same thing.
Third attempt with foot on gas pedal it finally fired up but was running a cylinder down until I gave it a few blips on the gas pedal.

Decided to drive it home and swapped vehicles as I didn't want to be stranded in Morrisons

Left over night and it has fired up no problem. Only possible problem I can hear is a whooshing noise from fuel pump. Possible air in system ?

Any pointers ? Seems fine now, but I have zero confidence in it. Bad fuel, one off hiccup ?

Cheers

OK, so you're running on BP fuel, would that be BP petrol or BP diesel fuel?

Its a diesel - 2004 Landmark

Change your fuel filter chap... if not that I would say the pump has pooed itself

I was thinking fuel filter, have one on order. Checked my orders and was replaced in May 2016, but only done less than 2k miles.
Fingers crossed! Cheers.

< 2K in 2 and a half years? That might be an issue if the fuel in the tank was that old. Diesel does not go off as quickly as petrol, but it does go off after a year or so.
I would change the fuel filter as you plan to do and then fill the tank fully to dilute any non-viable fuel and go on a long trip to drain it without stopping then refill. If you are feeling bold I would pull the fuel pump and siphon as much old fuel out as possible first, then stick a couple of plastic cans worth of fresh fuel in to get you to the filling station.
Otherwise, it could be aerated fuel, so bleeding the system won't hurt. Ignition on, 5 or so pumps of the throttle until the MI light flashes, then have a cup of tea and wait for it to finish. Repeat as required.
If you can check fuel pressure, plug the set into the sensor port at the fuel pressure regulator to read pressure in the gallery. With the engine running you should see 4 bar in the gallery if the fuel pump is doing its job.

It has actually done a 1000 miles between MOTs
Had a lot of use lately so I don't think it's bad fuel. Unless the filter is blocked.

I got out this morning to open a gate and noticed the pump whining away. Could this be the pump on it's last legs or something else ?
Took a video which I'll attached below....never heard the pump before.

Hi change your fuel filter, there not too expensive nor hard to fit

Got a bosch filter on order, should turn up Tuesday. Going to pull the pump as well and give it a clean and go from there.
Thanks for all the replies - will update thread next weekend. Cheers.

Oh....wouldn't start after a 30 min drive this morning so not a one off!

Noisier pump than usual normally means it's about to give up, but I wouldn't rule out injector washers.

Update. Changed fuel filter. Still the same gurgling/whining noise, although it hasn't not started yet!
I did think about injector seals, but the oil level is spot on which would suggest these are ok ?

The fuel pump starts priming the system as soon as the ignition is on.
Blown injector seals can introduce air into the system, but the noise should then stop once the system has been bled. Did you bleed the system? If you did so a few times and definitely removed all the air then the noise should have stopped - at least until the engine starts and more air is introduced.
If the noise carries on, the the fuel pump is probably dying.

Right, so over Christmas/New year I have fitted two pumps. Neither seem to work (just cranks over) - but as soon as I fit the old pump it fires up.
Is there a procedure I'm missing ?
I pump the accelerator and let it self prime a few times - anything else ?