So I've had a look at the procedure for this. It looks fairly straightforward in theory:

 

• Don't open the doors
• Undo 3 hoses by pressing the buttons on the clips (tray to gather excess fuel spillage)
• Undo a screw
• new one in 
• connect hoses
• Job done

 

However I know that things often don't go according to plan. 

What challenges/gotchas are there for the fuel filter?

Am I able to do it without jacking the car up?

 

One issue I'm aware of and may potentially encounter is the rusty screw breaking/stripping.

Anything else that could potentially go wrong?

 

 

 

 

In case this turns up in anyone else's search: Screw was pretty much the biggest challenge here. It was rusted through. I ended up drilling the head off and used mole grips to remove the rest.

 

Clips were fiddly, but managed to do it with gloves on (the thin medical style rather than chunky mechanic ones).

 

Turns out the old filter was last done in 2016. 
There were a few large bits of dirt in there, but it wasn't black sludge.