Barack Obama is due to announce that America's mission in Afghanistan will be over at the end of the year.
In an address later today the US President will say that beyond 2014, American forces will train Afghan Forces and support operations against al Qaeda.
But America will only keep troops in the country after 2014 if the Afghan government signs the Bilateral Security Agreement.
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Professor Sir Brian Jarman told BBC Radio 4's Today programme "it's likely" that similar events to Gosport have occurred in other hospitals.
Tory Eurosceptic Jacob Rees-Mogg played down the significance of the deal struck by the Government to win over pro-EU rebels.
The Tanaiste issued the warning to the UK ahead of a visit to Dublin by European Commission President Jean-Claude Juncker.