THE year is 1935 and these two guys are about to start 'calling all cars'.

In today's hi-tech world of texts, mobile phones and instant messaging, it's strange to think that the police once had to patrol and control the city without the aid of radios.

These boffins, at Glasgow's old Pinkston Power Station, were busy installing the city's first Police Wardens Transmitter, which gave officers very basic radio links. Mind you, their radios were almost the size of this transmitter, so not very portable.

The transmitter, a mass of dials, valves and wires , allowed fairly rudimentary communications across the city, with the first radio patrol car system put into operation in May, 1936.

Now, all together: "Come in Car 54. Where are you?"