I´ve stayed in London before, but I wanted to show London to my family as well.
We searched for a family-friendly hotel and found Kensington Manor Hotel which offers Bed & Breakfast for families for a good price.
We really liked staying in this hotel, because the hotel rooms were very clean and neat and you had a short way to Central London. The price of the family room was very good for the good location of the hotel and its good service.
Kensington Manor Hotel is my recommendation for a family trip!