Update: 2 pizzas were baked, results below.
Method:
Baking steel heated to 370°c by the gas burner, pizza placed onto it for a few minutes until it reaches the level of bottom charring required.
Pizza is then placed in a preheated 230°c fan oven for around 3-4 minutes.
After this I switched the oven to grill mode so that only the top element is heated and fan is disabled. (Broiler in USA)
Once happy with the colour the pizza is removed and left to cool on a rack before cutting and eating.
I used sliced Arla mozzarella from a 2.3kg block, grated parmigiano reggiano (I had to use this up before buying pecorino romano), EVOO and chunky sliced pepperoni.