It looks close to the clutch cable, but infact the fuel line cannot touch it - I'll probably double check before going to IVA.
Decided on routing around the outside of the plenum:
Note - I re worked this last line (Here) - the return from the pressure regulator to the swirl pot later in the build. Still going over the plenum, but then following the outside diagonal chassis tube on the other side of the steering column to give more clearance.
Part way through I thought the lines might want to sit lower under the steering column, i.e. as they enter the engine bay drop right down to the bottom chassis rail. That is the route taken on the factory build cars - I'm still thinking about it...