The David Rees Distinguished Visiting Fellowship scheme enables mathematicians of international renown to spend an extended period of time at the University of Exeter to enable them to contribute to the University’s academic and intellectual activities. If you are interested in visiting Exeter for a period of up to one month, do please look at the following link for more details and how to apply.
http://emps.exeter.ac.uk/mathematics/research/david-rees-fellowship/