Amazon expected to launch Echo in the UK on September 14th

Amazon sent a mysterious invite out to UK publications this morning, hinting that the company might be about to launch its popular Echo voice-controlled speaker. Amazon originally launched the Echo in the US last June, but has not yet made it available in Canada or internationally. The company's invite doesn't drop too many hints, but if you ask Alexa (Echo's voice assistant) what's happening on September 14th, you get a good idea.
"I promised I wouldn't tell," replies Alexa, in a video pos