London flat sought for regular trips from Wales

Moved to Welsh coast 2 yrs ago but missing family/friends/London culture. Looking to find nice but sensibly priced accommodation to enable me to stay in London for regular trips to the capital. I am a 65 yrs old retired teacher. Don't mind sharing a lounge with other people but need my own bedroom/ensuite. If possible I would like my own cooking facilities as I am a coeliac which creates a problem of gluten contamination if sharing pots & pans, etc. I'm easy going and have always had very good reviews in the past by Airbnb owners about how I looked after their property.