The chief executive of GSK has declared that the US is the best place for pharmaceutical companies to invest.

Emma Walmsley said the US led the world in launches of drugs and vaccines and, alongside China, was the best market for business development .

She is the latest boss of a leading UK drugmaker to talk up business opportunities on the other side of the Atlantic, after AstraZeneca’s Pascal Soriot hailed the “vital importance of the US” .

The UK government, which has been trying to strengthen the pharmaceutical sector, confirmed on Wednesday that the proportion of revenues from new medicine sales that companies need to pay back to the NHS would fall next year – from 22.5% to under 15%.

Reducing the record clawback rate was a central demand of the sector but negotiations br

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