from Colin McKeeman is this 1967 Flight International article.
It describes an early touch screen input device using touch wires embedded in the glass surface of the screen
Malcolm Hemming added that
“In ’67 I was one of four ‘guinea pigs’ on EU.47, a TWD trial at the Apollo computer at Redbrae. (The others were George Ennis, the late Bob King, and Bunny Crane). I still have the trial report, loads of boring foolscap of ’67 type data and bumff, no pictures, and probably unlikely to be of much interest. God knows why I keep this stuff…