[StormEye]

"CCTV also showed the diminutive bandits inside the building. "

So there were TV cameras that showed the robbers.
And who was watching the CCTV monitors?
Why have security cameras if no one is going
pay attention to what they show?
And I think the thieves had inside help,
as others have on FreeRepublic have stated.

[Purdue77]

At around 4am GMT the villains cut off a power supply by starting a small fire at a distribution box on a nearby bridge. The blaze knocked out the electricity and shut down the museum's alarm system allowing them to gain entry without alerting the authorities.

I must be missing something. How is it that power to the alarms was cut but not also to CCTV? And, why wasn't there a backup electrical system? Who designed the security system?

[21twelve]

“SNIP

Tiny thieves Security sources say the thieves were very small in stature to have been able to fit through the tiny gap they managed to make.”

It’s pretty obvious they had inside help - from the Tiny Thieves Security Company. (How dumb can one be to hire THAT company!) ;)