Desperate efforts to find hundreds missing, including 33 Brits, after horror flooding in Nepal have been halted over fears a massive dam, which has already overflowed, will burst.

Chinese media has reported that a barrier lake, formed during Wednesday’s landslide and holding over two million cubic metres of water, overflowed today.

Rescue operations in the area have been suspended while the situation is monitored. Nepal police reported earlier that the dam had "breached" on the Tibetan side of the border.

At least 475 people have died in Nepal where nearly 1,000 people are missing, while 558 people are missing in Tibet, where three people have been confirmed dead.

On both sides of the border, hundreds of foreign nationals are among those missing, including 33 British citizens. A 13-year-old girl and a 14-year-old boy are believed to be the youngest UK citizens unaccounted for.