Paper Title: Cambridge led Active Regions and Flares CDS Campaigns Author List: Mason, H.E., Del Zanna , G. et al Abstract: The Cambridge led Active Region and Flare Campaigns have provided a substantial amount of CDS observations. With these data, we are able to relate the high temperature emission with the footpoint regions. This enables us to study the plasma properties and to relate these to features seen with other instruments (MDI, TRACE, RHESSI and GB observations). Poster: Yes