TECHNOLOGY is a marvellous thing. The digital switchover may have caused a few headaches but most people now enjoy a range of channels in digital quality.

And the free airwaves left behind from the analogue signal being switched off are being utilised in novel ways by scientists and entrepreneurs.

The latest scheme is an early-warning flood system using sensors that communicate over these free airwaves.

With autumn upon us many residents will be pleased to know when they are turning on the telly, it is also enabling them to possibly be protected from floods in the future too.

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