In the mid-1970s, the Glasgow Subway was in dire need of an overhaul and Blue Peter paid us a visit to get the lowdown on the system's first major modernisation plans.
Broadcast on February 3, 1975, a special report was filmed with the long-running BBC show's legendary presenter Peter Purvis, who was treated to a 15 pence birl round the 15 stations of Glasgow's famous 'clockwork orange'.
Right from the off Purvis noted that the only thing that had changed on the underground had been the fares, with commuters still travelling in the very same carriages that were debuted when the system opened in 1896.
