It is easy to dream of returns from shares way ahead of the market. In practice it can be difficult to match, let alone beat the market. Over the past year, for example, the FTSE 100 index is down 2.5%. That means a lot of constituent shares show a negative return in that period.In this article my ambition may therefore sound modest but in fact is ambitious. I have picked five UK shares I think could add 20% to their share prices between today and later this year.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…Reopening shares for growthThe end of lockdown could bode well for some reopening shares.C&C Group owns drinks brands like Magners as well as a wholesale distribution business. Pubs reopening should mean a significant boost to revenues. This month, it said it looks to the current financial year “with increased optimism”.I think the brand portfolio should help C&C capitalise on pent-up demand in the on trade. However, the pandemic has put pressure on its finances. The impact of reopening may take time to show and indeed, some pubs may never regain their former patronage levels.WH Smith shares are up 87% over the past year. However, they have stumbled lately and lost 12% over the past couple of weeks. I think this could be a buying opportunity. More commuting should mean higher footfall in station stores. Its airport locations should also benefit as flight passenger numbers climb. Any further delays to reopening could hit the shares, though. I also wonder whether a shift to digital reading during lockdown could permanently hurt its sales of physical media.UK shares with digital growth storiesIt’s no secret I have high hopes for S4 Capital. Last year these UK shares more than doubled. But since December they have been in a trading pattern where share price growth seems to have paused. Tomorrow the agency is due to release full-year results.Executive chair Martin Sorrell has already said these will show like-for-like growth during the pandemic “at the north end of the market’s estimates”. I think the growth story could propel the shares up 20% this year. But the shares treading water may portend a shift in sentiment. The digital ad space is very crowded and S4 is only one of many players.A potentially more surprising pick for a digital growth story among UK shares is Morrison’s. The pandemic has seen many shoppers move purchases online. Morrison’s may trade on its traditional image but it is no digital slouch. In its peak trading period towards the end of last year its online sales more than tripled.The digital growth story could help shares appreciate further this year. But a downside is that due to delivery costs, digital sales are often less profitable for retailers than instore sales.Shifting investor sentimentTobacco shares have been out of favour in recent years. That has driven prices down. Lately, though, I think some investors have been bargain hunting. I know I have.British American Tobacco is up 11% over the past year. But I continue to see some possible upside. With its growing revenue, increasing profits, and 7.4% yield I still think these UK shares are undervalued. However, it could be hard to keep growing profits when tobacco use is declining. Many ESG investors shun tobacco stocks, reducing demand. “This Stock Could Be Like Buying Amazon in 1997” Our 6 ‘Best Buys Now’ Shares Christopher Ruane | Wednesday, 24th March, 2021 I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! 5 UK shares I think could increase 20% this year See all posts by Christopher Ruane christopherruane owns shares of British American Tobacco and S4 Capital plc. The Motley Fool UK has recommended Morrisons. 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. 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. 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