Existing Brand Refresh/Refinement

*Ignore Budget for a moment*
**Must be able to supply evidence of existing similar work**

Hello
I have a client who would like their existing brand reviewed and updated. This isn't a rebrand - all artwork will stay largely the same. This is about the brands communication - making messaging clearer, improving the tone of voice/trust building/ensuring consistency, brand treatment suggestions.

This is a pitch for the work. I will need you to provide a cost for the pitch and then a cost for the work should the pitch be successful which I believe has a good chance due to an existing relationship.
Thanks