Well it turns out, as I frantically try to research the title of a book I once read that qualified as Steampunk ... that it's sitting on my own bookshelf.
I knew I liked it. Must have. 'Cos I bought it.
I been remembering the imagery you see - the docks of High Haven and the Victorian sailing ships travelling the solar system. As the the book's jacket says:
"...the pleasure gardens of the Moon... the perilous Asteroid Sea and the cruel canyons of Mars where Angels fill the red sky with their ravenous cries..."
It's the splendid "Harm's Way" by British sci-fi writer Colin Greenland.
Dare I read it again? Or will I be disappointed after all these years?