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FREE REPORT: Why this £5 stock could be set to surge Are you on the lookout for UK growth stocks?If so, get this FREE no-strings report now.While it’s available: you’ll discover what we think is a top growth stock for the decade ahead.And the performance of this company really is stunning.In 2019, it returned £150million to shareholders through buybacks and dividends.We believe its financial position is about as solid as anything we’ve seen.Since 2016, annual revenues increased 31%In March 2020, one of its senior directors LOADED UP on 25,000 shares – a position worth £90,259Operating cash flow is up 47%. (Even its operating margins are rising every year!)Quite simply, we believe it’s a fantastic Foolish growth pick.What’s more, it deserves your attention today.So please don’t wait another moment. Get the full details on this £5 stock now – while your report is free. 5 UK shares that could double my money in 2021 I know that this headline for UK shares can sound contradictory when the broad indexes are falling.In February, it was clear that the stock market rally had all but stalled. The FTSE all-share and FTSE 100 indexes, on average, were lower in February compared to the month before. The FTSE 250 fared better, but the party is slowing down for it too. 5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…But what is true for the overall index is not true for all UK shares. Consider Card FactoryA case in point is Card Factory (CARD), the greeting card and gifts retailer, whose share price is up 20% as I write. I wrote about it last week. But the latest increase is so big, this UK share had to be mentioned again. This is particularly so because I think it shows the potential for UK shares of retail companies for 2021.Retail has suffered during the lockdowns, but things are improving. Soon retailers will be able to open shop. Hopefully this will also come with with less social-distancing precautions, as more and more people get vaccinated. Based on this, aside from CARD, I can think of at least four other retailers that will benefit. And going by the latest share price increase for CARD, I think they could actually double my money in 2021. Strong market for home goods and petsOne of them is the home-goods and grocery retailer, B&M, whose shares have done very well in 2020 owing to its strong performance. With a price-to-earnings (P/E) ratio at around 20 times, I think this UK share can do even better. Another UK share to consider is the retailer Pets at Home. As the name suggests, it is a speciality retailer that sells pet products like food, toys, and accessories. It too has done quite well in 2020. In its last trading update in January, it said that its performance was “ahead of expectations” despite the challenges related to Covid-19. It is poised to do even better.FTSE 100 UK shares show robust increasesI am also looking closely at two FTSE 100 retailers — JD Sports Fashion and Burberry — whose share prices bounced back despite the challenges of 2020. I think 2021 will be good for them as retail stores open, but they are great stocks to hold for the long term. JD Sports Fashion is growing share in the popular athleisure market. Burberry is an iconic luxury-fashion brand. Notably it is popular with in China, probably the fastest growing consumer consumer market. Risks to UK sharesI do think, however, that it is necessary to look at the risks to retailers too. We still have coronavirus variants to worry about. As per media reports, the AstraZeneca-University of Oxford vaccine is not effective on them. There is also the economic slowdown underway. We will know its full effects only later in the year, when things return to normal. If there is a severe slowdown, non-essential retail spending could be hard hit.The take awaySo far, I see more positives than concerns. I think UK shares of retailers can do well in 2021. Enter Your Email Address Manika Premsingh | Monday, 1st March, 2021 Manika Premsingh owns shares of Burberry and JD Sports Fashion. The Motley Fool UK has recommended B&M European Value, Burberry, and Card Factory. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. See all posts by Manika Premsingh Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee.