I have now managed to find some screencaps of Derek’s appearance in “The Magician’s Apprentice”.
here he is in “The Witch’s Familiar”.
here are some shots from the end of “The
Witch’s Familiar” in which I played the bronze Dalek behind the Doctor and
Clara (from which I was able to take my sneaky onset photos).
Dalek’s eye view of the above scene.
here are some screencaps from the Doctor
Who Extra episode interviewing Nicholas Briggs, the voice of the Daleks.
you look closely on the monitor in front of Nicholas here, you can see a
rehearsal shot from the episode; thusly, Derek has his top removed and you can
see my face (though it is something of a blur)!
shot here was from my third day of filming, where I was in the bronze Dalek up
on the stage (though he wasn't actually in shot in the final episode).