Do we have any obligation to the British Council if we start a EWoW project?
You have no material obligation whatsoever, but you must acknowledge British Council copyright of the materials when you use them, and you should inform the British Council that you have started the project. We also hope that you will let other colleagues – in schools in your area or in other areas – know about the project, give / send them the URL of the project, encourage them and even help them implement it in their schools.