No. The Red Panda Chassis is only suitable for lot number 2998 of BR Diagram 1/002 - the eight panel steel body style - as per the Red Panda kit. The first lot of Dia. 1/002 (2194) with the five panel body had LNER clasp brake underframes - this was the largest single lot with 1,000 vehices. The next three lots (2340, 2420, 2461) have five panel bodies and Morton vac underframes. The next two lots (2467, 2729) had eight panel bodies and Morton vac underframes.
Instructions (attached) are provided on how to convert the body to the earlier five panel style - conversions will of course require different underframes, as noted above.
The first BR Lowfit (BR Diagram 1/001 - lot number 2107) was the LNER wooden dropside body married to an LMS clasp brake underframe.
Mark McKendrick
Red Panda Railway Models