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From its HQ in Cambridge, the first home computer, the Clive Sinclair ZX Spectrum sold millions of units worldwide.

A new film called 'The Rubber Keyed Wonder' has been launched to tell the tale of the Spectrum revolution.

Anthony and Nicola Caulfield directed the film and tell Emma Bullimore about their love for the ZX.

(Picture credit: ÃÛÑ¿´«Ã½)