The scene is one that warms many hearts in December, when the advent calendar is being demolished.

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He pops in and out of doorways, dodging buses and darting into shortcuts and passageways industry as an Advent calendar.

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Walking through the door is like opening the window on an advent calendar: the walls are painted a vivid raspberry, and wintry draughts are kept at bay by thick red curtains across stone doorways.

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As viewers got a small taste of what Ceefax had to offer, millions of Britons during the 1980s invested in new teletext-enabled TV sets which gave them access to the full Ceefax service, which by now included recipe details for dishes prepared on BBC cookery shows, share prices, music reviews and an annual advent calendar.

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