Tim Wallers is an actor, the kind of performer a scene gets handed to when it needs holding together. Since 2006, the hiring has not stopped for long. Roughly 27 credits in 20 years means a rhythm of work most performers never manage. In cinemas, 'Mamma Mia! Here We Go Again' is the credit that matters most, as Ensemble Performer. 'RocknRolla' is the second title that tends to come up.