This unique apartment which is among Britains most flamboyant flats thanks to its marble and murals has gone onto the rental market for more than £20,000 per month. See SWNS story SWFLAT; From the outside, North Gate is a typical luxury mansion block overlooking Regents Park in London. But the moment you open the front door of one property you are met with a breathtaking four-bedroom flat which has undergone a no expense spared overhaul. Over a five-year period, the flat has been transformed with marble flooring and walls covered with elaborate murals.