Mick Jagger has been looking to the past on recent albums and festival dates. But a pair of urgent new singles are firmly set in the present.On Thursday, the Rolling Stones frontman&nbsp;released two tracks,&nbsp;"Gotta Get A Grip"&nbsp;and "England Lost," that describe, as he put it in a statement, the "anxiety, unknowability of the changing political situation" in a post-Brexit U.K.&nbsp;The production is resolutely modern, built on programmed drums and clanging guitar&nbsp;noise. The London grime artist Skepta even joins him for a verse on "England Lost.""Ostensibly, it&rsquo;s about seeing an England football team lose, but when I wrote the title I knew it would be about more than just that. It&rsquo;s about a feeling that we are in a difficult moment in our history. It's about the unknowability about where you are and the feeling of insecurity," Jagger said in a statement."It's obviously got a fair amount of humour because I don&rsquo;t like anything&nbsp;too&nbsp;on the nose but it's also got a sense of vulnerability of where we are as a country."The "Girls" actress Jemima Kirke&nbsp;also stars&nbsp;in a new&nbsp;clip for "Gotta&nbsp;Get A Grip." The songs are Jagger's&nbsp;first new solo material since 2001's "Goddess In the Doorway."