The London Mathematical Society has a scheme available to provide support for groups of mathematicians, working in at least three different locations in the UK, who wish to engage in collaborative activities. The maximum grant awarded is currently £1,200.
Details here
Address: The London Mathematical Society
De Morgan House
57-58 Russell Square
London WC1B 4HS
Telephone: 01752 2310
Email: s.huggett@plymouth.ac.uk.ac.uk