The real question is the stakes, and the level of competition, and over a week at the All-England Lawn Tennis Club it was clear that a high-level field was playing for keeps.

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The treehouse has undergone something of a renaissance in recent years, with canopy-level accommodation springing up all over Europe.

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Over-all bank lending to firms and households remains below the level it reached in 2008.

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Mr MacAskill retorted that crime in Scotland was now at its lowest level in 35 years, the clear-up rate for all recorded crimes was at its highest level for over 30 years and that the risk of being a victim of crime in Scotland is lower than in England and Wales.

BBC: Scottish Labour: Justice debate