The European Space Education Resources Office (ESERO-UK) is a project of the European Space Agency (ESA) and national partners including the Department for Education (DfE), The UK Space Agency (UKSA) and the Science and Technology Facilities Council (STFC). The key objective of the project is to promote space as an exciting inspirational context to enrich the teaching and learning of science, technology, engineering and maths (STEM) subjects. Increasingly, the focus is on primary school teachers in order to encourage more children to pursue a STEM-based career. The project makes use of ESERO-UK's network of "space ambassadors", who have arranged and facilitated several interventions using a space context, such as continuing professional development (CPD) sessions for teachers, visits to planetaria and use of its resources. This article describes the resources and support ESERO-UK provides for the primary science curriculum.