This takes you to the main Environmental Agency (EA) page on Environmental Permitting Guidance for Radioactive Substances. (Non-nuclear)
A set of documents from the Scottish Environmental Protection Agency (SEPA) with respect to radioactive substances regulation. Note that the Radioactive Substances Act 1993 (RSA93) still applies in Scotland, whereas this has been replaced by the Environmental Permitting (England & Wales) Regulations 2010 (EPR201). Therefore this page provides examples of important differences in radioactive substances regulation across the UK.