I have not stayed here before, but this is one of the cheapest B&B I found on the web. The website looks good for that price. They have two wings. Newer one cost more.
Relatively cheap B&B. Value for money if you are in a group and get a family room. There are better places to stay in during winter where many places in London has "winter sale".
Certainly better than the hostels. Theme: Bed and BreakfastComparison: least expensiveDirections: Near Victoria. Nearest Tube station is Victoria. About 10 minutes walk from the underground.