From their site:
Keep Calm Gallery was established in January 2007 by Lucas Lepola and Hayley Thwaites. We founded the online gallery as a result of our passion for typography in poster design, British heritage and the medium of screen printing.
In the early days KCG was run from our university halls and after graduating we each worked from our parent's homes a few hundred miles apart. KCG is now run from our home office in South London where we eat, sleep and live amongst bubble wrap, postal tubes, boxes and lots of lovely art.