Where can I find DIY store supplies in Heathrow?

DIY store supplies can also be found in these cities:

Addlestone Ascot Barnet Borehamwood Brentford Chalfont Saint Peter Chessington Edgware Egham Epsom Feltham Greenford Harrow Hayes Hounslow Isleworth Kingston upon Thames Leatherhead London Mitcham Northwood Perivale Ruislip Shepperton Slough Southall Stanmore Sutton Twickenham Uxbridge Walton-on-Thames Weybridge Windsor Woking invalidcity

You can also find this in Heathrow:

Worktops Kitchens Bathroom Cabinets Flooring Flooring Promotional Products Booklets Stamps Envelopes Stationery