Hi TomandSophie,
This appears to be a long thread, and my apologies for not reading it at all thoroughly, but it seems the closest to one of our major problems. Anyone seeing our blog 'boatlife.blogspot.com' will know we finally took ownership of NB Seleus recently.
We've not had the slightest problem keeping the stove going overnight with Taybright, and re-started within minutes of returning from Sue's (my) house last week - just newspaper, kindling and Taybright. NO - our problem is DRAFTs - of the windy type thro' ill-fitting metal front and rear doors and side hatch. We can see daylight from the bedroom cabin to the steering deck!!
We plan to line the door channels with carpet tile cut-offs to fill these gaps and hope it is successful. However, if this does not work it will at least cut down some drafts. I know we require a certain amount of fresh air inside, but I would rather be the instigator of this source of cold air!!
We are presently back in my draft-free but unsold bungalow for a couple of days to pack up more gear for the boat, also to see my lovely Bedford Blues given a short, sharp shock by Nottingham!