Does anyone know how an OTU was organised. In 1945, there were Hurricanes, Spitfires and Thunderbolts flying with 73 OTU in Egypt. Was there a squadron for each type and more than a squadron per type, and how many planes in each?

Furthermore, does anyone have a partial list of numbers used by the Thunderbolts?

It seems that the Spit and Thuns were using the same sequence.

Many thanks in advance