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. No savings at 40? I’d invest in these 2 FTSE 100 stocks to retire on a rising passive income Image source: Getty Images With the FTSE 100 offering a wide range of income investing opportunities, it is never too late to start building your retirement portfolio.In many cases, large-cap shares can deliver high dividend growth to complement their impressive yields. This could mean that they provide a growing income return in the long run which improves your chances of enjoying financial freedom in older age.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…With that in mind, here are two FTSE 100 shares that could be worth buying today. They may enable you to achieve a growing passive income in retirement – even from a standing start at age 40.WPPAdvertising and PR company WPP (LSE: WPP) may not be considered a dividend stock by many investors. However, it has a dividend yield of 5.8% at the present time. This is partly due to its disappointing share price performance over recent years, as well as its dividend being maintained over the last couple of years despite weaker financial performance.Looking ahead, the company is making changes to its strategy to improve its competitiveness. For example, it is disposing of its non-core agencies and is aiming to use this capital to reduce debt levels. This could reduce the overall risk of the business while it aims to reposition itself as a company that is increasingly focused on the technology sector.With WPP’s dividend payout being covered 1.5 times by net profit, it seems to be highly affordable. The company is forecast to post a rise in its bottom line of over 8% next year, which suggests that its strategy is working well. As such, now could be the right time to buy its shares while they trade on a price-to-earnings (P/E) ratio of 11.HSBCAnother FTSE 100 share that could offer a growing dividend in the long run is HSBC (LSE: HSBA). It has also experienced a challenging period, with a change in senior management and mixed results causing investors to demand a wide margin of safety in its valuation.This has led to the stock currently having a dividend yield of 6.6%. Since it is covered 1.5 times by net profit, it seems to be highly affordable at its current level. And with HSBC continuing to invest in its growth opportunities, while at the same time aiming to become more efficient, it may be able to pay a rising dividend over the coming years.Clearly, the outcome of the US/China trade war is likely to have a significant impact on the company’s financial performance. However, this risk appears to be priced in, with the bank’s shares currently trading on a P/E ratio of just 11. Therefore, on a risk/reward basis, they seem to be highly appealing for long-term income investors who are seeking to build a growing passive income stream. Peter Stephens owns shares of HSBC Holdings and WPP. The Motley Fool UK has recommended HSBC Holdings. 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. Simply click below to discover how you can take advantage of this. Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! See all posts by Peter Stephens Enter Your Email Address “This Stock Could Be Like Buying Amazon in 1997” I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. Our 6 ‘Best Buys Now’ Shares Peter Stephens | Tuesday, 14th January, 2020 | More on: HSBA WPP 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.