View everything online. Check stock in your local store. 6,000 products can be ordered online. Delivery free over £400, otherwise from £5 depending on order value.
40,000 home, garden, leisure and DIY products. Free standard UK delivery over £45, otherwise £3.95. 
Fair selection of tools but mostly sundries, kitchen fittings and handles. Delivery 4 - 7 days. Free for orders over £45 otherwise £5.95.
Reasonable range (1,000 items) but not much variety. Emphasis on lighting and electrical. Delivery £7.95 per order - usually takes 3 days.
Good selection of tools, also bathroom accessories, garden tools and outdoor buildings. 'Points' give about 5% off next order. Free delivery over £100
East coast DIY shops selling tools, garden machinery, pest control, furnishings and decorating materials. Free UK delivery over £250 otherwise varies.
Scandinavian electric underfloor heating systems at very competitive prices. Order before 2.45pm for free delivery next working day.
Small selection of electrical, hobby and craft tools. Usually good prices if they happen to have what you want. Free delivery over £35, otherwise £2.99.
One of the largest ranges of tools and equipment. Mainly a trade supplier but plenty for DIY too. UK delivery from £4.95 depending on weight.
Good selection of bathrooms, showers and kitchens but not fitted furniture. Also heating and plumbers tools, tube, fittings, workwear and consumables.
Not just screws & fixings but also tools,
plumbing, electrical etc. Order by 6pm for next
weekday delivery - free to most of UK on orders over £50.
High quality kitchen and bathroom taps at much reduced prices and free UK delivery on all orders.
Not as quick as Screwfix, but if you are not in a great hurry they a worth a look, especially for special offer DIY tools. Delivery £4.95
Plumbing & heating: boilers, wet rooms, bathrooms, showers, heated towel rails, central heating parts, kitchen sinks. UK delivery from £10.
A favourite with builders as well as DIY enthusiasts. Free delivery on orders over £45.
Probably the best known DIY suppliers here are B&Q, Wickes, Homebase and Screwfix.
Wickes has a decent range for DIY and smaller building companies, in most trades including electrical, plumbing and heating as well as tools and fixings, but not all of their stock is available to buy on the internet. You can view most of it, but only buy some of it. Homebase has a much larger number of DIY and light building products available online, but is aimed more at the home DIY enthusiast than the small builder.
Ryobi drill with
4.5" angle grinder
2 batteries, charger, bag
£99.99
delivered free
B&Q have a huge range of 35,000 products, including kitchens and bathrooms as well as tools, outbuildings and other DIY materials in plumbing, electrical carpentry and other trades. Everything can be viewed online, where you can also build project shopping lists. You can then check stock at your local store. About 6,000 of the 35,000 products can also be ordered online for home delivery. UK delivery is free for orders over £400, otherwise between £5 and £20 depending on the total value. Unusually and very helpfully, if you register you can even design a kitchen online using their kitchen planner.
Screwfix has a bigger range of most tools and fixings and everything is available online. Their deliveries are very quick (next day if you order before 6pm) and free for orders over £50 (otherwise from £5). Definitely worth a look. Tooled-up are quite similar in many respects and are worth checking for price comparison, but they do charge for all deliveries and are not as quick as Screwfix. Their power tools are often cheaper than Screwfix, but work out about the same by the time you add delivery charges. If you are buying more than one power tool at a time, Tooled-up can be cheaper than Screwfix, even allowing for delivery.
Look out, too, for the Screwfix clearance specials, which can be very cheap indeed.
Choiceful can sometimes beat the better-known companies on price and their free delivery threshold is lower than most at £45, but standard delivery is slower than Screwfix.
If you want bigger tools, such as industrial or agricultural equipment or tools for the bigger workshop, you will probably find what you want at Northern Tools and Equipment. They also do a huge variety of the more traditional ranges of hand and power tools and frequently offer better prices than Screwfix or Tooled-Up. They are not as quick as Screwfix and some of their products are sent direct from the manufacturer. You also have to be careful to compare total prices including delivery, which is charged, but certainly worth comparing with the more obvious suppliers for most tools. Northern can even supply tools from America if they meet UK standards.
Some of the DIY suppliers do supply some tools and equipment across most trades, but really specialise in a narrower product range and only have a small selection of items outside that specialty. An example is diy-supply, who do sell tools but most of their stock relates to lighting and electrical fittings. Also, diyessentials, who focus on knobs, knockers and handles. DIY Tools add garden tools and outbuildings, including greenhouses, sheds etc, to their fair selection of tools, fixings and things for the bathroom. It is also worth checking Maplin for a few tools, especially small electrical, craft and hobbyist sets.
Even more specialized are hotfloors , who sell electric underfloor heating that is made in Scandinavia, where they have been experts at doing this sort of thing for a long time. We have searched around and have chosen hotfloors for besthighstreet because we think you you find their quality and prices hard to beat.