You have done well.
I would need to ask if the picture was one you have either taken or have written permission to use.
The big issue with many posters / websites / articles / leaflets etc that people make using pictures off the internet is copyright, the person who has taken the picture will own the copyright off the picture. If the picture was not something that MMC owned or had purchased the right to use and did not have written permission to use either the poster or the picture MMC could be taken to court for theft.