cramp

Mr Sharabi says he was taken into Hamas' network of tunnels, where he describes spending months with three other hostages in cramped, inhumane conditions with little sanitation or food.

The BBC investigation from within four unnamed asylum hotels also uncovered cramped living conditions, and smoke alarms covered with plastic bags as residents used electric hobs in their showers to cook.

Currently, known side effects are the risk of stomach upset, muscle cramps and bloating.

He could smell unwashed bodies in the cramped room he shared with 40 detainees.

Before the journey, he told colleagues he was suffering stomach cramps but insisted he was fit for duty.