Fairy has been top-dog in the washing-up liquid world for 75 years, but there are many other options to choose from in the supermarkets - so which ones stand up to the comparison test?

Here's what I found. Fairy Original Washing-up Liquid costs £2 for 654ml at Morrisons, which works out to £3.06 per litre. Most supermarket own brand liquids come in 450 - 500ml bottles but the ...