Forget the holly. The UK's top six supermarkets need to start decking their halls with food, and fast.

The Grocer 33 has revealed that availability levels of basic ranges are in decline - grim tidings just one week before Christmas.

It seems retailers have become so consumed with environmental issues such as reducing waste, cutting plastic bag usage, and recycling, that they have taken their eye off the availability ball, and allowed stock levels to plummet. Exclusive data from The Grocer 33 reveals that the majority of our top six have chalked up near to double the amount of out of stocks for the second half of the year compared with the first, not only leading to unhappy shoppers, but also smaller basket spend. Bad news all round.

So this is a reminder to all retailers: it doesn't matter how green your fingers are. Customers expect full shelves. Basics still count.