A definitive account of the flooding of Cwm Tryweryn and its impact on Wales in both cultural and political terms. As a means of countering this rise in Welsh national consciousness, the DVLA opened in Swansea in 1965 and the Royal Mint moved to Llantrisant in 1968. Both are symbolic symbols of State. Coincidence? Or decisions taken to stymie the growth of political Welsh nationalism and to send a message that Wales ‘rightfully’ belonged in the family of British nations? Whatever the truth, the flooding of Cwm Tryweryn began the process of devolution and in no small measure led to the creation of Welsh Assembly.