"That's what we're doing at the moment, taking advantage of that arbitrage," Aitken said.

“充分利用这次的套利，这就是目前我们所做的。”艾特肯说。

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Mr Aitken said "for a small minority prison is the only thing that is going to work".

BBC: Criminal Justice and Licensing Bill debate part 1

The Scottish Conservatives' justice spokesman Bill Aitken said community sentences were an example of "soft touch Scotland".

BBC: Jail service 'should be split up'

But Tory justice spokesman Bill Aitken said the government had until 2011 to make sure the extra officers were delivered.

BBC: Row over Scottish police numbers