The Metropolitan Police's new cyber crime unit have put together a check-list for online shoppers looking to avoid online fraudsters.
Customers scrambled and pushed to snatch cut-price deals as part of "Black Friday" in frenzied scenes seen across the UK.
Shoppers expected to storm the High Street in search of bargains.
Marks & Spencer made progress with a strong performance in Food, International and M&S.com. Our key priority was the re-launch of Womenswear. In September we launched our first new collection with new advertising and improved store formats.
Although only in store for three weeks of the half year, our Autumn/Winter collection has been well received by customers, and we have seen some early signs of improvement.
– Marc Bolland, Marks and Spencer chief executive
At the same time we continued to invest in the long term transformation of the business. We are pleased with the progress made, given the high level of activity and a number of key projects launching this year.
This has led to a higher level of additional costs, which while planned for, have impacted short-term results.
Marks & Spencer's pre-tax profits dropped by 8.9% to £261.6 million during the six months up to September, with the retailer's star-studded launch of its autumn/winter clothing range hitting its figures.
The retailer also reported a ninth consecutive quarter of clothing and homeware sales being down and claimed that consumers remain reluctant to spend.
Like-for-like sales in its food business rose 3.2% in its second quarter, however, general merchandise sales dropped 1.3% between July and September.
Chief executive Marc Bolland said its revamp of womenswear was its key priority during the period, and is showing "early signs of improvement".
Marks & Spencer said that while consumer confidence appears to be improving that does not mean it translates into higher spending and added that it was cautious for the rest of the year.
David McCorquodale, head of retail at accountants KPMG, who sponsored today's retail sales survey by the British Retail Consortium said the poor figures show Britain's economic recovery is a "slow, relentless slog".
– David McCorquodale, head of retail at KPMG
October was another difficult month for retailers, reminding us that recovery is a slow, relentless slog.
Whilst the summer months hinted at increased consumer confidence, retailers will struggle to maintain a sustained sales recovery until wage growth outpaces price inflation.
October saw clothing sales plunge amid unseasonably warm weather, according to figures from the British Retail Consortium (BRC) and KPMG.
Despite being hot on the heels of four fashion weeks, good weather kept October shoppers from buying autumn fashions - making clothing the only retail category in decline that month.
A like-for-like rise of just 0.8% compared to a bleak period last year has left firms relying on a "bumper Christmas".
Retailers say they received a "reality check" last month after sales on the high street in September made it the weakest month of the year so far.
The British Retail Consortium (BRC) and KPMG said like-for-like sales growth of 0.7% on a year ago made September the weakest month of the year to date and showed that consumers are still cautious despite signs of economic recovery.
Unseasonably warm weather stifled sales of autumn and winter clothing collections, with shoppers happy to leave purchases until later on.KPMG's head of retail David McCorquodale said: "These figures are a reality check and will make retailers nervous as we enter the run up to Christmas."
Grocery sales showed a weak performance in September, although sales of children's clothing and shoes put in a strong showing due to the tail-end of the traditional back-to-school spending spree.
The UK economic recovery still faces "significant challenges" despite a growth spurt of around one percent over the most recent quarter, business leaders have said.
The British Chambers of Commerce (BCC) wants the Government and Bank of England to ensure that momentum is maintained, particularly as external risks such as the US debt crisis threaten to derail the fragile recovery.
Its quarterly economic survey, which is made up of responses from more than 7,400 businesses, shows improvements in most key areas for both manufacturing and services compared with the second quarter.
BCC director general John Longworth said: "The Government mustn't get distracted, and has to put growth first at all times."We will be looking ahead to the Autumn Statement in the hope that the Chancellor uses this opportunity to make a real difference and go all out in the name of growth."
Chief executive of mental health charity Mind Paul Farmer said that Asda will donate £25,000 to the organisation after selling a 'mental patient' fancy dress costume.
The official Twitter account of Mind wrote:
Asda have shown themselves to be extremely misguided with their ‘mental health patient’ fancy dress costume.
It is staggeringly offensive to the one in four of us affected by mental health problems and our families and friends, and troubling that some businesses are still so out of touch with the public mood.
– Sue Baker, Director of Time to Change, run by Mind and Rethink Mental Illness
However it is encouraging to see the groundswell of outcry on Twitter and that our voices are being heard.
We hope this will urge Asda as well as other retailers and manufacturers to review their processes and consider taste and decency on mental health grounds, to avoid fuelling stigma and discrimination that are so damaging for large numbers of the population.
A Tesco spokesperson told ITV News they have removed a fancy dress costume called "Psycho Ward" from their website and apologised "for any offence caused".
A spokesperson said: "We're really sorry for any offence this has caused and we are removing this product from sale.”
Asda has been criticised by charities for its 'mental patient' fancy dress costume but they are not the only major retailer selling outfits based on mental health issues.
Tesco sells a bright orange adult costume called "Psycho Ward" which has the word "committed" printed on the back.
The website's description of the costume says: "Dress up as the most thrilling psycho killer character of all time in this Psycho Ward costume, consisting of a bright orange, long-sleeved boiler suit with zip fastener to front 'Psycho Ward' printed on the chest.
"The same words (are) printed on the back in larger letters with a prominent 'Committed' stamp just below."
ITV News has asked Tesco for a comment but they have not yet responded.