The UK Environmental Observation Framework (UKEOF) works to improve coordination of the observational evidence needed to understand and manage the changing natural environment. It is a partnership of public sector organisations with an interest in using and providing evidence from environmental observations. UKEOF coordinates the Environmental Observation Activity Catalogue, which aims to hold information on all of the environmental observations undertaken by or for the UK by the public sector. The catalogue also holds metadata on a number of voluntary organisations observation programmes and has the potential to include observations made by private organisations. The catalogue currently contains a list of over 1200 observations which involve over 200 organisations. UKEOF works closely with UKDMOS who provide information about all UK marine monitoring activities for inclusion which ensures a full suite of environmental observations can be explored.