I used to run a mini artic with Iveco Daily Tractor Unit (supplied by North East Truck & Van) and custom trailer (supplied by RM Trailers).
With your current 107 restriction code, you are limited to 8250GVW. If you were to take a C1+E test this would increase to 12,000kg which is far more useful.
You will also need a good vehicle operators licence.
Feel free to meet me with any questions.