Our data unit analysed rental costs in the £900-£1,000 bracket in the most desirable postcodes in Wales to work out just how much more you’ll end up paying in London. The results are startling.

South Kensington’s SW7 postcode (22.5 per cent) and Chelsea’s SW3 postcode (18.8 per cent) further rank as some of the best, providing home buyers with plenty of open space outside of their home.