Finished cutting and fitting the floorboards, I didn’t make the best  job of it but it will do as the lino will hide most of the rough bits.  Part of the problem was trial fitting the gearbox cover seemed to mislead me as to the position of the boards at the edge of the opening.  I think edging the opening with some aluminium angle will be the solution once the lino is on.

Once the boards were screwed to the frame I was able to trial fit the entrance step bay sheet metal work, this is a much better job and also serves to cover up some of the bad cutting of the floorboards.

Trial fit of floor boards.

Tomorrow I should be able to start drilling holes to mount the bay, whilst the floorboards will get a good soaking in preservative ready for painting.

Step bay sheet metal in place