Keyfact is a small business which keeps an eye on what's being advertising in the windows of banks and building societies. We do this by spending an hour once a month walking around a few city centres taking pictures of the outside of bank and building society branches, including any posters they have in their windows. Our only interest is in seeing what's visible - no need to go into branches, no need to collect leaflets. It's a once a month job, should take max one hour, and it's flexible and easy