Hi Holger, I was a resident host (ie. offering rooms in my home) in London for several years, and I am considering starting it again. This is a different business to offering out a whole flat, I know. As @Helen3 has said, you need to be aware that the rules in London are that entire flats can only be booked for 90 nights per year. AirBNB complies with this and will not allow you to exceed this limit.