Tim Samuels helps some of the most neglected old people in Britain air their grievances by breaking into the pop charts. Meet The Zimmers, the world's oldest rock band with a combined age of over 3,000. The 40-strong troupe is led by 90-year-old lead singer Alf. With a U2 producer on board, can the OAPs get their voices heard by actually breaking into the Top Ten? Show less