Sir Tom Jones, 84, has admitted he has “less control” over his voice now he’s gotten older as he prepares to continue his current tour. The singer heads to Spain later this month for a string of gigs as well as the Netherlands, Malta, Cyprus, Greece, Portugal, Germany, the USA and, of course, the UK later in the year. The Sex Bomb hitmaker has performed for concertgoers for decades, achieving chart success as far back as the 1960s. He’s sold over 100 million records worldwide and remains a mainstay on British TV screens as part of the judging panel on ITV’s The Voice. And luckily for fans, it …