Question time # 73

Above pic added 06-10-09 @ 0648am showing all four in a line.
The two answers to date are correct ! So the fish has been won.

What aircraft do we have here then ?
As usual the civil registration is a requirement before consideration is given re the issue of a chocolate fish.
In the event of more than one correct answer I may require you to advise me of the aircraft types for the next two aircraft in the line up !