It is hard to see in the photo, but at the bottom of the hatch opening the wood slopes outwards and has good contact with the cabin metal side. If this is a good hardwood and well painted, then I didn't see any need for any more sealing at this point. The slope allows any water to drain overboard. I didn't place a sealing strip on this side as I didn't want to potentially interfere with drainage. It could be possible for water to get between the wood and steel and I check for this fairly regularly by looking for rust and softening of the wood, but no evidence yet. Yours may be different.
Yes, Jen, there is a sizeable gap all the way along the bottom of the frame between the steel wall and the wood frame - I do not know if there is a wood lath missing or if the internal skin has just shrunk away - I need to seal that bottom frame (with a slight slope outwards, like you said, to guide the water out down the side of the boat. Any ideas? Perhaps something like a car body filler, sanded and then painted? Or, if there is enough leeway between the bottom of the doors and the frame, a thin lath of hardwood? But the rubber strips that you have put in are brilliant for the sides and the top. Thank you so much for your pictures and comments. John.