The Cluster Collaboration is a collaboration between teams in the Astrophysics groups at the University of Exeter (led by Tim Naylor) and Keele University (led by Rob Jeffries). The collaboration provides photometric catalogues for a number of young stellar associations and clusters. These catalogues can be found at the Cluster Collaboration homepage.
In addition to the catalogues, the collaboration maintains a server providing access to the semi-empirical pre-main-sequence models used by our group to determine pre-MS ages here. The models provided are detailed in Bell et al. (2014), and will allow the user to measure pre-MS ages in a consistent manner with those presented in Bell et al. (2013) and Bell et al. (2015).