Inside the block of luxury London flats with its own private art gallery and cinema

There are two things that are certain in London - there is a dearth of affordable housing but a healthy supply of luxury London flats.

In fact, the average property price in Britain's capital is now at £551,000 ($794,000), according to the Office for National Statistics.

But this pales in comparison to new luxury developments that seem to be cropping up everywhere and space is not an issue when you have cash.

The latest? A block of luxury flats in Marylebone, London which is the first set of apartments to have a private in-house art gallery, called The Chilterns. Starting prices are £3.8 million ($5.5 million).

But it's not just any art gallery - it's stocked with original pictures created by one of the world's most famous photographers David Bailey.

"This is the first London art gallery with works by a world renowned photographer to be showcased within a private residential development, featuring specially commissioned works by international photographer David Bailey," said Stephen Conway, Chief Executive Officer of Galliard Homes.

"The new art gallery lobby is one of the most exciting and unique features of The Chilterns. The project highlights the close interplay between London's luxury property sector and the art world. New buildings and homes have spaces ideal for artwork, so new developments like this help to drive the market for new works of art and important existing pieces."

The Chilterns is a 44 luxury apartment development by Frogmore & Galliard Homes, and is located between the local shops of Marylebone High Street and Baker Street, and overlooks the greenery of Paddington Street Gardens.

But if you think a private art gallery is decadent, take a look inside at the other ridiculously luxurious amenities the block of flats has.