A brief description is given of NDT developments in AEA Technology in the last 25 years. It is pointed out that there is a large technical breadth as well as a wide range of applications in both nuclear and non nuclear markets. This breadth is a major strength of the National NDT Centre. It has meant that it has been very influential in the development of NDT technology and is now successful commercially in fields such as NDT system licensing and sales and NDT service work.