In line with my advertised prices the cost for the day is £695.  This includes:
briefing call (upto 30 minutes)
attendance in person on the day
sketch image (s) (usually produced within 24 hours)
debriefing call (upto 30 minute)
full use of the visual notes.
General terms. 
both parties have the right to share the image(s) on social media.
it is your responsibility to ensure permission is given for visual notes to be gathered.
I cannot sketchnote for many consecutive hours.