Thanks for all the advice people
OK, my little Stovax Huntingdon 25 stove is on order, we're going for a 5kw multifuel DEFRA approved version as we're in a smokeless zone. Have found a couple of sources of free wood plus some already seasoned wood sources, sorted where my woodstore will go, and booked the builder/installer to sweep and line the chimney, and hack out the fireplace. I don't think I'm going to go down the chainsaw route as I'm a bit scared of accidentally cutting some of my body parts off, but a friend has said he will chainsaw any big lumps I get and I will use a bowsaw/mawl/logsplitter to do the rest.
Just need to get the gas capped off, find a lintel and some stone for the hearth and we are away. I'm very excited, bring on the cold weather
I will be laughing in the face of 30% energy price rises. I hope