Wood burning Stoves are probably now the most popular heating for a English Cottage, so cozy and easy to run, the warmth spreads all over. Old cottages like this, have very thick walls so the heat does not escape easily!
I like the way they did this harth and the color painted behind the stove. I also like the wood beams framing the stove in. Maybe have similar framing and the make a gate around the stove out of the same wood.