This thread has something of the Ooslam bird about it!
There is no ticket office on the platform at Exeter Central. The passengers didn't walk past a ticket office on their way up the stairs to the gateline. There is a help point on the platform but not a ticket office which is staffed by rail operators without the necessary ticket machines!
They did at one time have
Avantix▸ machines in that office on the platform, when did that cease to be the case then?