When the Museum of Practical Geology moved from Jermyn Street to the new premises in Exhibition Road in 1934 the second gallery had displays illustrating the geology of the UK divided into nineteen local regions. The then current Director of the Survey, John Flett, approved the preparation of a series of guides, one for each of the nineteen regions. These became one of the most popular series of publications the Survey has produced. They have run to many editions and are still a current and popular publication. Six for Scotland, thirteen for England and Wales, later, a similar publication for Northern Ireland was produced. South and North Wales both had separate regional guides recently they were merged into a new single edition covering the whole of Wales.