Returns season highlights the need for new warehouses, according to Colliers International.
Non-food retailers witnessed the biggest decline in sales since 2009 in the run up to Christmas.
Over a third of retailers said sales were up in December, compared to a year ago.
Online shopping on Boxing Day is forecast to exceed a billion for the first time.
The price-slashing approach to retailing is counter-productive, claims Foresight Factory.
Christmas trading is not all doom and gloom, writes Ian Tomlinson, founder of RetailStore.
More than 82,000 packs of copied underwear seized by border guards in run-up to Christmas selling season.
The level of footfall across all retail destinations rises has failed to meet expectations so far.
British retailers also expect sales volumes to pick up again in December.
Ladies pyjamas lept into the top five list of the most-searched-for items at M&S.