There has been lots of excitement over the new T-Mobile ad in which lots of people dance at Liverpool Street Station – how clever, how interesting, "golly can you imagine if that actually happened"…but no one seems to have pointed out the fact that it's not remotely an original idea – have a look at Improv Everywhere's brilliant Grand Central Station or Food Court Musical. Hmmm….OK so it's not exactly the same but you'd have thought the makers of the T-Mobile ad would have at least given a hat tip to the (to me) obvious source of their inspiration.