UK: Average age of rolling stock by Train Operating Companies (TOCs) September 1, 2011 | Data & Statistics The average age of rolling stock (overall) for TOCs witnessed a decline in the UK between 2003-04 and 2006-07. from 19.35 years to 13.7 years. Post 2006-07, there has been a steady increase in the ove... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password