The employee-owned group, seen as a retail bellwether, said on Sunday that department store sales rose to 123.5 million pounds ($192.9 million) in the week to December 10.
The 2 percent figure was a gross number, inclusive of VAT sales tax and new space contribution.
Analysts estimate sales had fallen 5 percent, excluding VAT and new space.
With UK disposable incomes squeezed by rising prices, muted wages growth and government austerity measures, British retailers are nervous about consumer spending in the key Christmas trading period and high street discounting is rife.
Industry data for November was weak and companies such as fashion retailer French Connection
On Wednesday, outdoor goods firm Blacks Leisure
($1 = 0.6402 British pounds)
(Reporting by Matt Scuffham; Editing by David Hulmes)