I made it to the timber yard this evening and picked up some 9mm ply which I have banged, shoved, squeezed, sworn at and prayed over as I used my ultimate knowledge of DIY - brute force and ignorance, to position below the gunnel. I have some more to do above the gunnel but I shall get some help to do that - another pair of hands will make it easier to keep in place and limit the number of times it bangs on my head.
In the process I have cut my finger, a minor ailment for the amount of triumph by the achievement.
Next (other than learning how to spell) is to sort out the shower. I couldn't get the previous hipbath out of the room so decided to saw it up and use it as the shower tray. I can almost hear some of you groaning in disbelief - but do not be dismayed, it will be a huge success - I can feel it in my bones!
Oh yes, I threw out the loo which has added to my discomfort. I am rather overjoyed that I have no sink or shower to wash in! What a wonderful excuse to fester for several weeks until the job is done.