Britain wants Andrei Lugovoi extradited [AP] 

Britain awaits a reply from Russia after expelling four of its diplomats over Russia's refusal to extradite the man suspected of murdering former agent Alexander Litvinenko.

Russia says it is planning a "targeted and appropriate" response.

What will the outcome of the diplomatic stand-off be, and how does it affect the downturn in Russian-Western relations?

Inside Story looks at the detail.

Watch this episode of Inside Story here:

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Watch Inside Story at 17:30GMT on Al Jazeera English

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