Lottery winners swap £90k semi for £5m futuristic mansion

Matt and Cassey Topham, who won £45 million on the Euromillions Lottery, have applied for planning permission for a £5 million futuristic eco house - complete with a maze, grotto-style swimming pool, and secret garage.

So what are they getting for their money - and how does this compare with other lottery-winners' mansions?
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