Fake!
Hats off to the first poster who said that Derren had "jumped the shark". The wikipedia entry is an interesting read. I suspect that Derren jumped the shark some time ago.
The mistake with the "Casino" program was that the camera shots were electronically manipulated to try to show interference, but it was done in such an amateur way that anyone with some knowledge in this area, immediately knew that the pictures were faked.
In the "Hero" program the footage from the so-called "hidden cameras" had a venetian blind like effect added as if to tell (chav) viewers "this footage is really from a hidden camera". No camera generates footage like this. Again it smacks of amateurism and as soon as I saw this I knew the whole program was a set-up. You would have thought that Derren/producers wouldn't make the same mistake twice

.
The rest of the hidden-footage looked implausible to me, and I was waiting for the Matt stooge/actor to hit his head on one of the so-called hidden cameras or to physically bump into a cameramen in the street.
I just watched the interview with the GF and mother, and again for some reason it seemed un-real or acted. Perhaps they were too good an actress?
After 10-15 minutes I stopped watching.
-> Please complain to C4. You can do it online.