A Forever 21 store advertises sales ahead of the Black Friday sales on November 20, 2019 in London, England. (Photo by Hollie Adams/Getty Images)

The volume of Black Friday payment transactions in Britain as of 1000 GMT was up 12.5 percent versus last year, initial data from Barclaycard showed on Friday.

Barclaycard, which processes nearly one pound in every three pounds spent in the UK, said its data showed transactions had also been strong throughout the week of Black Friday.

“With many retailers spreading their deals out throughout the week, they will be encouraged to see this hasn’t cannibalised sales volumes on Black Friday itself,” it said.

The firm did not give a figure for the year-on-year movement of the value of sales. Last year transactions increased 10 percent versus 2017.

With recent UK consumer spending subdued, Brexit still unresolved and a Dec. 12 national election creating new uncertainties, retailers have been hoping for a boost from Black Friday discount events that were first brought over from the US by Amazon in 2010.

Analysts have suggested Black Friday sales could be helped this year by its fall on the last Friday of the month, which coincides with payday for many.

With harsh lessons learnt from past Black Fridays, British retailers are stretching promotions over several weeks, aiming to smooth out consumer demand and reduce the pressure on supply and distribution networks.