Welcome, @Jo620 ! You might get more visibility for this topic if you start a new thread in the forum.
Your listing looks like a nice and cozy place to stay, and I like your description of the surrounding area. I find that Private Room listings tend to require a bit more detail in the descriptions to help guests understand exactly what they're getting - people are often confused about the extent to which the home is shared, and if you're not careful in the correspondence you might find people showing up thinking they have the entire house. One approach is to add a floor plan diagram that shows which areas are inclusive guest access and which are not.
Well-staged and sharp photographs make a big difference when guests are searching listings - they see a lot of options at once, so the ideal lead photo is one that captures the aspect of your home that you expect guests to love the most about their stay. It doesn't have to look like a real-estate ad - you're selling an experience as much as a room - but I would avoid shots that are out of focus or make it hard to see the full room. Maybe call over a friend with a wide-angle lens to help with that.
I see that you offer guests access to the kitchen but not the lounge, and I see no picture of a kitchen table or indoor seating area. If the only place where guests can sit down to eat is in the garden, British weather will present a bit of a problem. And as for the rules - well, everyone has a different idea of what "major cooking" entails. I'd say, either add photos and descriptions that show how the Kitchen and Breakfast amenities can be enjoyed comfortably, or perhaps reconsider offering them at all.
As far as what else to include - it helps to visualize who your target clientele is, what they're coming to your area for, and what features are most suitable for that experience. A lot of people these days are looking for spaces where they can integrate remote work, so if you'd like to attract that demographic, a lot of attention will be paid to whether you have a desk and office chair. But if you'd rather focus on budget holiday-makers, put yourself in the mindset of someone on vacation and think of how the home can be a fun place to hang out at the end of a day of sightseeing without a lively common area.