BSUPA's Simon Bassett and Matt Argyle have been working with the RNLI and other national bodies to develop a safety leaflet for people thinking of stand-up paddle surfing.
You will be seeing this leaflet at shops, beaches, and activity centers all over the UK, but it is also available here.
If you go out into the surf you need to read this, especially the sections about etiquette in the lineup and wave priority.
This document applies to surfers, kitesurfers, windsurfers, and bodyboarders.