Grub build / Gravel Pub Fixed / Trek Soho S was Carrera Subway Zero not Pompino

Rat build, functional pub bike, #tracklocross whatever you want to call it - want to build another bike that is fixed with a disc brake and big tyres.

After selling a fixed with a disc condor tempo, I kept the cranks and wheels with a future rat build in mind - ideally a Pompino, Plug 0, etc. for pub duty and the occasional gravel ride, including the upcoming Brother in the Wild 2019.

Cheap, ratty but functional Pomps are like hens teeth and I've just 'won' a Carrera Subway Zero. From what I can tell this was launched by Halfords chasing the fixie bandwagon back in 2009.
I've not got it yet but it appears to be some kind of MTB/Hybrid thing with rear facing drop outs.

Stuff I got

1. Wheelset: H+ Son fixed/fixed rear, H+Son Hope disc front
   
2. Tyres: Gravel King SK 32c
   
3. Drivetrain: Cogs 15-19t, 44t Chainring, SRAM S300 courier crank
   
4. Seat/Seatpost
   
   

Going to need

1. Disc Fork, no idea what yet
   
2. Hydraulic disc brake
   
3. MTB handlebars
   
4. GXP BB
   
   

The build is about keeping it cheap but functional. Haven't decided if I'll take a rattle can to it yet, ideas welcome..