john caudwell has bought a car park in audley street , mayfair and is planning to replace it with a huge block of flats .
the new complex will contain five townhouses , a mews house , three penthouses and 21 more luxury apartments .
the homes being built by phones4u entrepreneur will boast their own swimming pools and private gyms .
but he could have difficulty with planning permission if vip neighbours object to proposal for four-storey basement .