Should I buy these cheap UK growth shares for my ISA?
These two UK growth shares appear to be exceptionally cheap right now. City analysts think De La Rues (LSE: DLAR) annual earnings will rebound more than 300% in the financial year to March 2022. This leaves the business trading on a low forward price-to-earnings (P/E) ratio of 12 times. Its plenty cheap on paper, then. But Im still not tempted to invest my hard-earned cash in this UK share. 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 well show you something that could be key to unlocking 5Gs full potential... The companys share price has risen 13% during the past year but I expect the money printer to resume its downtrend again soon as the use of physical cash steadily declines. This UK share has lost around 60% of its value during the past five years. Fresh consumer payments data from UK Finance illustrate De La Rues problems perfectly. This shows that the number of contactless payments on these shores rose 12% in 2020 to 9.6bn. Obviously contamination fears following the Covid-19 outbreak caused people to stop handling metal and paper money. But the switch to cards and contactless was rising strongly even before the pandemic. Contactless now accounts for 27% of all transactions versus just 7% four years ago. Efforts to develop its authentication business could reap large rewards in its own right in the years ahead. But I fear this wont be enough to offset the steady erosion of the UK small-cap shares money manufacturing arm and especially in the post-coronavirus era. Remember that woes concerning its banknote printing business prompted De La Rue to warn that it could struggle to remain in business less than two years ago. A better UK share to buy  Id much rather buy 4Imprint Group (LSE: FOUR) shares for my Stocks and Shares ISA. City analysts think annual earnings here will boom 288% in 2021, leaving the UK share trading on a forward price-to-earnings growth (PEG) multiple of 0.2. 4Imprints share price has rose a less-impressive 6% during the past 12 months. But I think the company  which makes products that companies emblazon their logos over (think mugs, T-shirts and pencils)  is in much better shape than De La Rue to continue rising. Latest financials in May showed that momentum in the business has built substantially following coronavirus-hit 2020. 4Imprints strong performance is perhaps no surprise. History shows us that companies tend to supercharge the amount they spend on marketing activities as soon as economic conditions improve. But this isnt the only reason why this particular UK share is thriving. Its also grabbing market share in a highly-fragmented sector at an encouraging rate. Its true that earnings at 4Imprint could disappoint on the back of rocketing inflation. This is because the Federal Reserve could be forced to step in and raise rates, hitting the economic rebound in the UK shares core US marketplace. Still, at current prices, I still think the product maker could be too cheap to miss and Id happily buy it for my shares portfolio.