Airbnb provides the cheapest accommodation through out the world on minimum amount of rent. Airbnb can get you accommodation a very good accommodation @ Rs. 3000 per day in London and even cheaper than that. Therefore, if you are going on holidays you can easily book your stay in London at the minimum cost. When you visit Airbnb site, there is a filter on the left which you can click and adjust your budget. It will show you the option with in your budget. You can find a number of places to stay in London which you can and enjoy your holidays.