Ok Thanks!
The way that I saw (and read from a CAA info leaflet) it was that a CPL allowed you to act as PIC of single pilot aircraft. An fATPL allowed you to act as PSIC of two pilot aircraft and ATPL allowed you to fly as PIC of two pilot aircraft. I thought therefore you would need an fATPL mimimum to be able to act as a first officer on any airliner be it an ERJ145 or a 744.
Am I wrong about that? I could get a position as First Officer on somthing like an ERJ 145 or ATR 75 with a CPL???
Thanks