Conversation so far:
What was David Gilmour's involvement with Kate Bush?
David Gilmour is credited for bringing songwriter Kate Bush to public attention.
How did David Gilmour bring Kate Bush to public attention?
In the 1970s, David Gilmour received a copy of songwriter Kate Bush's demo tape from Ricky Hopper, a mutual friend.

Question: What was his reaction to the demo?
Self-contained rewrite: What was David Gilmour's reaction to Kate Bush's demo?