This synthesis is not intended as a full summary of workshop discussions and will not include every point you raised. It is a presentation of some of the key threads that have run through our discussions, together with a few issues that we think warrant further attention. It has been put together to provide a ‘kick start’ for discussion on the final day of the workshop and is not intended to constrain that discussion. If you want to spend more time on a another issue already discussed, or to raise something new, please do so.