Thousands of pounds of damage was caused to Metros and trains by a graffiti gang - three of whom were employed as cleaners on the rail network.
Tags were repeatedly sprayed on carriages and rolling stock by the gang, who focused their attention on depots in Heaton and Gosforth but carried out damage as far afield as London and Scotland.
Newcastle Crown Court heard ringleader Adam Smith was involved in the majority of the offences while Jordan Shone, Mark Marshall, Colin Bell and David McGuire were also involving in causing widespread damage. The five all pleaded guilty to conspiracy to cause criminal damage between January 2018 and June 2019.