Franz Ferdinand visited Nottingham seven times in their first three years, building up to a 2005 show at the arena. Since then, two albums, but no gigs. A fine joint album with Sparks recently rejuvenated both bands. Sparks were magnificent here last summer and hopes are high for tonight’s FF return. Fifth album Always Ascending takes the familiar template (influenced by XTC, Wire and even a little Talking Heads) with less of the pop/disco elements which left some of their audience behind. It only came out on Friday, so the busy crowd don’t know opener Paper Cages, which singer Alex Kapranos introduces with a balloon heart. In the old days, Kapranos was a cool front man and the band exuded angular, sardonic wit. These days,…