I can't believe I missed it but I did! There's another Magpie Electrical reference in Doctor Who. This time, a piece of Magpie Electrical is part of the Tardis and that doesn't bode well at all. I have a feeling this is what leads to the Tardis exploding and creating the Crack.
Magpie Electrical was featured in Series 2 of Doctor Who in The Idiot's Lantern, and we saw it most recently again this season in The Beast Below.
Thanks to Denyalle for the heads up!!