Cameron 'neutral' over failed Pfizer AstraZeneca bid

David Cameron says the government remains "neutral" over a bid by US drugs giant Pfizer for British firm AstraZeneca, as the takeover attempt reaches its final stages.

Shares in AstraZeneca have slumped after it rejected an increased offer of £55 per share.

Pfizer says it's the final offer it will make, but AstraZeneca argues it undervalues the company.