I need to collect email addresses from a website

I would like a list of email addresses and names of the President, Treasurer and Social Secretaries of the Junior Common Room (JCR), Middle Common Room (MCR) and Senior Common Room (SCR) at all of the 40+ Oxford University Colleges.

This data is freely and publicly available by searching for each college e.g. 'Keble College MCR' The college names are all to be found here: http://www.ox.ac.uk/about/colleges