Isn't that "Deja Vu again"? I beleive the 146 started life as a reworked (no rear ramp) & re-engined variant of the V/STOL transport HS681 that was meant to support the P1154 force.
I haven't been able to locate a picture but beleive there was one in the old "Profile" on the P1127 that certainly looked just like a 146 with a Pegasus under each wing. May be someone on Prune has one & could post a copy of it.