A former UK ambassador to Uzbekistan is to give a lecture in Cardiff in support of Bradley Manning, the US soldier accused passing thousands of classified military documents to whistleblower website Wikileaks.

Craig Murray, who is now a writer, broadcaster and human rights activist, will give a lecture called "Why do we need whistleblowers in a democracy?" at Cardiff University on Monday, 16 April (18:00 BST).

He spoke to Felicity Evans on BBC Radio Wales' Sunday Supplement.

Pte Manning, who has a Welsh mother and American father, spent some of his teenage years in Pembrokeshire, and the lecture comes as National Theatre Wales is staging a play called The Radicalisation of Bradley Manning.

He faces charges of obtaining and distributing government secrets, and is accused of making intelligence available to "the enemy".