Marks & Spencer is understood to be planning a second one-day Sale following what is believed to have been a successful one-day promotion last week.

During Marks & Spencer's one-day Sale on November 20, prices on most of its goods were cut by 20 per cent.

The next sale is expected to be on December 4, although the retailer has not confirmed the date.

House of Fraser is holding a two-day Sale at the end of this week, when it will slash prices by up to 40 per cent.