Dual-flow mixers provide independent hot, cold or mixed water after leaving the end of the spout. They can be deck-mounted on the sink or pillar/bridge-mounted for a more traditional look. Alternatively, choose a monobloc tap, which is a single-hole fitting that usually has two handles for hot and cold water supply.

Buying this "service deal" can be expensive but if you feel happier knowing that you are protected from breakdown for a few years, shop around insurance brokers to see how prices compare.

Energy efficiency is of paramount importance, not only to save money on electricity bills but also to help reduce power station emissions that contribute to global warming. Look for brands with low energy consumption (energy efficiency ratings will be displayed in the showroom). Levels are now as low as 1.3kW/hr on some slimline models largely because of reduced water consumption. A delay timer can help take advantage of cheap overnight electricity.