Free delivery is always good. Free delivery with no minimum spend is always better!
There's a real mix of retailers on this list, from household names right through to small independents. Not all of them are based in the UK, but they do offer free shipping to it.
Note: I haven't included marketplace - ebay, etsy, folksy, etc - sellers.
★ Amazon (Prime). Okay, so, you have to pay for Prime so it doesn't really qualify for this list - but, as one of the best known free delivery options, it's muscled its way on regardless. If you don't have Prime, try using a filler item tool like supersaverdeliverytool or fillerchecker to find some cheap bits and bobs to get your basket over the £20 threshold.
★ 365 Games. (Entertainment)
★ 7Toys7. (Toys)
★ AO. (Electronics)
★ Audio Affair. (Electronics)
★ BASE. (Entertainment)
★ Better World Books. (Entertainment)
★ Book Depository. (Entertainment)
★ Carphone Warehouse.
★ Charles Clinkard. (Fashion)
★ Coffee Brand.
★ Currys / PC World. (Electronics)
★ Deal Extreme. (Various)
★ DRB Car Spares. (Auto)
★ Dune London. (Fashion) Pay delivery on your first order, then get free standard delivery on all orders made in the following twelve months.
★ Electrical Discount UK. (Electronics)
★ Elemis. (Health and Beauty)
★ Fan21HK. (Toys)
★ Fishpond.com. (Various)
★ Fy. (Homeware)
★ Gardening Direct. (Gardening)
★ Hive. (Entertainment)
★ Illamasqua. (Health and Beauty)
★ Jersey Plants Direct. (Gardening)
★ Live Moor. (Arts and Crafts Supplies)
★ Look Fantastic. (Health and Beauty)
★ MAC Cosmetics. (Health and Beauty)
★ Mimiwoo Dolls & Accessories.
★ Music Magpie. (Entertainment)
★ Nike. (Fashion) Join Nike+ for free and get complimentary free shipping.
★ Pannu Design. (Party Supplies)
★ Pepe Jeans. (Fashion)
★ Pink Office. (Office / Business Supplies)
★ Psyche. (Fashion)
★ Richer Sounds. (Electronics)
★ Shave Lounge. (Health and Beauty)
★ ShoeZone. (Fashion)
★ Silent Night. (Homeware - Beds)
★ Simply Hammocks. (Homeware - Hammocks)
★ Smyths Toys. Become an account holder - for free - and get free delivery on all orders.
★ Something For Me. (Fashion)
★ Speedy Hen. (Entertainment)
★ Taylor of Old Bond Street. (Health and Beauty)
★ Ted Baker. (Fashion)
★ The Organic Protein Company. (Health and Beauty)
★ The Perfume Shop. (Health and Beauty)
★ The Towel Shop. (Homeware)
★ Timberland. (Fashion)
★ TOMS. (Fashion)
★ Urban Decay. (Health and Beauty)
★ Vodafone. (Phones)
★ Von Haus. (Homeware)
★ Wordery. (Books)
★ Zavvi Outlet. (Entertainment)
