Howard Limbert (with Martin Colledge, Martin Holroyd, Paul Ibberson, Nick Jones, Debora Limbert, Peter Macnab, Mick Nunwick, Duncan Morrison, John Palmer and Trevor Wailes). March-April 2001

This was the seventh caving expedition organised in conjunction with Hanoi University, with two of the provinces - Cao Bang and Quang Binh - being re-visited. 22.5 km of mostly river cave passage was explored and surveyed in the former area, and 5 km in the latter, with many unexplored leads still left in both. Permits proved to be something of a problem in the politically volatile 'new' area of Ha Giang, but nevertheless the caving potential of the area was proved with the survey of 2.5 km of predominantly vertical passage. Plans are already in hand for a return visit in 2003.