Callum unfortunately will not be streaming as David Bowie, not on my count anyway.
I've not posted earlier as I was hoping to come to another solution but unfortunately that was not possible.
I have a prior commitment on Friday evening that I cannot get out of.
As such, I will attend the first 30-40 minutes of the event (19:00-19:35ish)
I will then be back and participating from between 22:00-22:30 to the end of the event (assuming the sleep gremlins stay away!)