Operation Tân

Operation Tân (Welsh pronunciation: [ˈtɑːn], "fire") was the name of a series of police raids in Wales between 1 October 1979 and 30 September 1980. The aim of the operation was to identify members of Meibion Glyndwr, a Welsh Nationalist group responsible for burning English Holiday homes within the Welsh countryside.

In the backdrop of the arson campaign by the Meibion Glyndwr, the efforts of the British state to ascertain those responsible for the attacks had remained fruitless. In a move that has been criticised as a more generalised trawl of left and nationalist milieux within Wales, the authorities enacted a series arrests against those believed to be responsible or in knowledge of the perpetrators of the campaign.

The overseer of Operation Tân was the head of Dyfed-Powys Police, who controversially forbade detained suspects from accessing legal counsel under the provisions of the Prevention of Terrorism Act 1974. The Welsh Campaign for Civil and Political Liberties would give voice to those rounded up during Operation Tân.