[Doofus]

I have recently been commissioned by a substantially large charity organisation to revamp their “corporate image ” and to compile a “corporate” style annual meeting for them for an audience of approx 300. I have outlined to them what content I will be creating for them from scratch and have written permission from various artists for the use of certain music tracks as well as commissioning original pieces. My question is I am within my rights in the UK to effectively say that all of my work is my ownership and cannot be reproduced without my permission and that any and all subsequently included material from other artists cannot be reproduced without their express permission. The reason I ask is that they are now requesting outline documentation stating what content they can utilise for further use after the day! Thanks in advance for any help.