Trull Munor, or just Trull, was a planet filled with "roundabouts and poundshops". It had a hovertram and the Trull Central Institute for the Criminally Insane.
When Iris Wildthyme and Panda visited it in the 42nd century to evade a Monstron time destroyer, she described it as that century's version of Milton Keynes. Iris's number one fan Wayne Bland II found them there. (AUDIO: The Iris Wildthyme Appreciation Society [+]Cavan Scott, Iris Wildthyme (Big Finish Productions, 2012).)