Dr Carter and his graduate students have been experimenting with a dummy mine in a cake tin full of sand.

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These small but dense cakes filled with lotus paste and a whole egg-yolk centre symbolise the full moon, and it is the accepted practice to share a cake with friends, family and colleagues.

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Smith and Costos entertain so much that they employ a full-time cook, Chris Kidder, whose latest creation, a lemon marmalade cake, is pressed into a visitor's hands.

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Complimentary extras include a full breakfast buffet each morning, in-room wi-fi, fireside tea and cake service in the lobby every afternoon and fresh fruit delivered to rooms daily.

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