I would echo the sentiments about getting your own headset early on - definitely one of the best investments you can make when starting your training. The last thing you want is an uncomfortable headset distracting you from the task at hand!
As mentioned above, most of the Grob aircraft at Tayside do use the single pin plug headsets - although 1 of them has standard twin plug sockets.
If you are doing your training in the PA28 Warrior - all of those use twin plug headsets.