I came across a reference to Urban Sketching in an art blog and on investigation found a Southampton based group which had been formed in April 2014. It is Facebook based and is the only reason I have to join Facebook although my children have been using it for ages. I went to a 'sketchcrawl' at Netley Abbey in September 2015 and have just been to one in Oxford Street, Southampton. We meet the first Saturday in each month with some additional meetings in the evenings. Here is a little history from the Urban Sketchers website.
In 2007, a global community of urban sketchers began to form when Seattle-based journalist and illustrator Gabriel Campanario created an online forum “for all sketchers out there who love to draw the cities where they live and visit, from the window of their homes, from a cafe, at a park, standing by a street corner... always on location, not from photos or memory.”
This is the main advantage of the group, that is, sketching and painting en plein air as the French have it. Here are my first two attempts.