A 13-year-old, NHS workers and a priest are among those with links to the UK who are missing and feared dead after flash floods in Nepal.The death toll from the disaster has reached more than 600 as a team from the UK is set to arrive in the Napalese capital Kathmandu on Saturday. The Nepal Tourist Board has previously said that there are 33 UK citizens among the thousands missing after Wednesday’s devastating flash flood.The death toll from flooding in Nepal has reached more than 600 ahead of a team arriving from the UK to provide support. Nepal’s National Disaster…