Rent 1 bedroom house in London

I live with my daughter who is 19 and my 32 year old son. I work for the Government as a civil servant and wfh 3 days a week, we have a dog a border collie named Holly she is getting on now 11 years old. We live in a suburb called Sidcup the shops are only a minutes' walk. Central London is 25 minutes by train. You can walk to the train station it takes 15 minutes. I have 1 single bedroom spare with a wardrobe . There is a kitchen diner and a front room with a TV and 2 sofas. I like yoga and walking my dog, watching movies and cooking.