Charistmas Day is becoming the new Boxing Day, figures show, as more people are opting out of family festivities and shopping on their smartphones instead.

Amazon, the largest online retailer in the world, is anticipating its busiest Christmas Day ever this year, as its sales on Christmas Day have more than doubled over the past five years.

Christmas Day shopping is fast becoming "the norm" with one in five shoppers expected to start their online bargain hunt a day earlier than usual on the 25th, research by travel firm Inghams shows.

Retailers are planning to tempt smartphone owners with large discounts through adverts which pop up on their Facebook, Twitter and Instagram feeds in a bid to get them to part with their cash.

Amazon revealed that last year the entire day was busy, with many shoppers visiting the site early in the morning, and others visiting late at night.