I've got quite an idea, covering the section of mainline from the bridge where 2 tracks become 4 at P'boro to the A47 bridge. Covering, naturally the NVR having had a mainline link to the Whittlesey line (like the old GER). Peterborough NVR is a large-ish station with 2 platforms, two road shed, turntable and two long carriage sidings + Railworld. Furthermore, the Whittlesey line is shown as far as Frank Perkins Parkway- Oh, and in O without too many 'compromises', other than what's not necessary. This would include New England shed.