steve, from what pictures ive seen ,although the radio operator had a full size seat id agree with you on just the lap belt.In the pic ive seen you can only see the bottom corner of the seat and theres definitely a belt visible for the lap , if there was a shoulder belt too ,i doubt hed have been able to reach forward and operate the radio equipment.From what i could gather ,the beaufighter observers position was just a lap belt too, it was probably in keeping with the tradition of giving the back seaters a bum deal(!) as far as comfort goes- just look at the wire basket for stuka gunners and the luxurious leather strap stormovik gunners had to balance on!!! cheers tony