The main emergency number for UK is 999 – you should dial this number for any major emergency such as an accident, a terrorist attack or requesting an ambulance, the firemen or the police.

In Britain, you can be hospitalised and treated free of charge as an emergency patient regardless of your nationality. Only if you stay in the hospital for over a night, you may be asked to pay later for the treatment if your country hasn't got a reciprocal health agreement with the UK.

For minor health issues, you have the NHS 24-hour helpline: 0845 46 47.