Problem solved. Couple of 5 second cranks on a fully recharged battery and it started. After taking it for a spirited drive, the initial low fuel pressure fault (P0087) that prompted the filter change in the first place has also disappeared. Just finished putting her all back together and cue...

Changed the fuel filter today and I clearly didn’t bleed it properly. Started up for a few seconds and then died. I have since used a hand pump to bleed through the filter from the tank line (opposite the white connector) and then again on the red filter connector for the fuel return. I’m happy...