Is London heading for a dotcom boom?

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The internet company TweetDeck, which has been running for just three years, has been bought for £25m.

It is based near Old Street and now that area - known as Silicone Roundabout - is so popular with internet start-ups it is under the global spotlight.

But, as Warren Nettleford reports, it may not automatically result in a new dotcom boom.

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