Having looked at the reference photos that came with the kit, and visting Weymouth lifeboat, I decided that some of the wheelhouse subassembles needed a few substantial modifications.
Starting on the port side, the kit has simplified to build an approximation of the various storage boxes and trunking and vent housing. So I set about cutting down the sub assembles to shorten the forward portion of the vent housing and completely removing the forward part of cabin sub-assembly.
Moving to the starboard side, I lowered the blanking panel over the cabin vents and behind the stretchers and added a recess in the vent trunking for the stretcher supports. Also, as a result of the mods to both sides, I had to lengthen the supporting frames.
At the front, I altered the raised floor as it's not raised on the starboard side and built up the port side for the crew seat bases - there's also a recess within the seat base.
With that done, next time will come the start the the cabin detail.