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With American forces based across the Middle East, involvement may be unavoidable.

Do not drive unless your journey is unavoidable.

Her parents, Heather Parker and Leonard Hill, said regulations such as the requirement for emergency plans and clear signage could prevent future unavoidable drownings at water parks.

The Institute for Fiscal Studies has said "relatively modest" growth rates mean "sharp trade-offs are unavoidable".

Tough choices are "unavoidable" as the government finalises spending plans for areas ranging from the NHS and defence, to schools and the criminal justice system, a think tank has warned.