While looking further into a topic on a.n.other forum () I pottered onto this site on 'Plan Yellow': Fall Gelb, May 10th to June 4th 1940 Seemed like good concise info, and I like the very minimalist design of the site. Presumably a work in progress as a very few links to maps don't appear to have an associated picture, but worth keeping an eye on. Cheers, Adam.