Example
Markup: components/footer-app-links-block/footer-app-links-block.twig
<div class="block block-sr-footer-app-links">
  <div class="footer-app-links__outer-wrapper">
    <div class="footer-app-links__inner-wrapper">
      <div class="footer-app-links__copy">
        <h3 class="font--white">GET THE SPORT RELIEF APP</h3>
        <p class="font--white font--small">Track your steps, take on celebrity challenges and create leagues to compete against friends and colleagues. Our app has everything you need to get active, take part in The Nation’s Billion Step Challenge and fundraise for Sport Relief</p>
      </div>
      <div class="footer-app-links__download">
        <a href="https://itunes.apple.com/us/app/sport-relief/id1322989652?mt=8" style="display:inline-block;overflow:hidden;background:url(https://linkmaker.itunes.apple.com/assets/shared/badges/en-us/appstore-lrg.svg) no-repeat center ;width:148px;height:46px;background-size:contain;"></a>
        <a href='https://play.google.com/store/apps/details?id=com.sportrelief.app2018&hl=en'>
        <img alt='Get it on Google Play' src='https://play.google.com/intl/en_us/badges/images/generic/en_badge_web_generic.png'/>
        </a>
      </div>
    </div>
  </div>
</div>
Source: _sr18-styleguide.scss, line 304