Hello Alun,
basic frame works and bulkhead looks good , use pva glue for skins ,
dry fit all tempory fix with mask tape , start with bottom skins first, trim back to bottom stringers so nice and tidy , when this all fixed and dry , fix side skins with slight over lap,
when every thing is nice and dry trim back over lap a nice rub down with sand paper,
fill any gaps with p38
sand again , if happy give first coat of primer,
now go to inside of hull and give coat of resin pay attensoin to joints aply a bandage if required
its a big boat so will need a lot of TLC …….
what power are you going to use ?…
hope this helps cheers Larry…