If a loved one passes away in Hospital. The Hospital will be able to offer support and guidance with the next steps that need to be taken including issuing the medical certificate. The body will be held in the hospital mortuary until arrangements are made with your funeral director.
If your loved one passes away abroad. The death will need to be confirmed by a local doctor who can issue a Medical Certificate. The document should be valid in the UK but may need to be translated. You should also register the death with the local British Consulate, they will be able to record the death in the UK and offer help and advice.