By Mark Jefferies Feeling his age, Francis Rossi is taking steps to be as fit as Mick Jagger on stage. The Rocking All Over The World singer, 74, has been walking and swimming to get fit for the band’s upcoming tour. He compared himself to energetic Rolling Stones frontman Mick, 80, whose shows are physically demanding like Status Quo’s. Francis said: “I’ve been working out a lot and swimming a lot and trying to get fit for the tour. I think there’s only myself and Mick Jagger who do that sort of thing, but you do. I do workout exercises. I do 40 lengths in the swimming pool, I’ve been walking…