The following PDF documents detail a selection of ordnance items that may more commonly be encountered as UXO.
Each category is further broken down into separate sub-categories - click on the links to take you to a description of the ordnance.
NOTE: This list is by no means exhaustive and is provided as an indication of the wide variety of ordnance types. Most ordnance will undergo development throughout its service and so many different ‘Marks’ of the same ammunition may exist. These documents do not go into that level of detail and provide only a generic overview of the ordnance. The information in these documents is provided for interest only - it is not to be used or relied on for any other purpose.