Is it possible to convert my trip computer from imperial to Metric Units I do most distance in Europe so being able to switch from Miles to Kilometres would be useful.
If your odometer is in an LCD screen then almost certainly it will be switchable. Have you checked in your owners manual? Usually there's a button or buttons to press to swap the units over.
Have no experiance of other Triumphs, but on my tt600 if you press and hold the select and reset buttons on the dash together for 8secs, it changes from miles to kilometers.