After reporting concern about contamination, water quality tests performed by the Texas Railroad Commission found naturally-occurring levels of benzene, a known carcinogen, which exceeded the threshold limit for drinking water, but found no evidence to support a flaming water claim.

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All 16 members of the euro zone now breach the 3% deficit threshold, and 12 also violate the 60% debt limit.

ECONOMIST: Charlemagne

However, Japanese regulations have a lower limit for women, and the female worker in question exceeded that threshold three time over.

FORBES: [See update below]

"The Conservatives have made a series of uncosted tax promises - tax bribes, " said Mr Clegg, referring to Tory promises to recognise marriage in the tax system, limit the National Insurance rise, freeze council tax and raise the inheritance tax threshold.

BBC: Nick Clegg launches Scottish Lib Dem election campaign

"Personally, I think that having some threshold would give some more uniformity to the test, but pragmatically we don't want to limit the sensitivity of tests, " said Prof David Cowan from King's College London, who is in charge of anti-doping at next summer's London Olympic Games.

BBC: Ban on clenbuterol doping drug may be relaxed

The Telegraph says anyone caught above the new limit would face an automatic 12-month driving ban, even if they were only just over the threshold.

BBC: Government ponders report on lowering drink-drive limit