Having written an adaptation myself (of OHMSS) I was looking forward to this.
It hasn't disappointed and this faithfully replicates the movie , which isn't one of my favs.
I enjoyed reading your version more than I do watching the tired exploits on screen.
My only advice (coming a little late, though, I expect) would be to guard against being too respectful to the original movie. For instance at the end of the prologue you tell us:
The boat cleared the iceberg field and set course for an eventful cruise back to the shores of England.
But we don't really need to be told that. The chapter ends perfectly well in the sentence before. Similarly you mention the boat has been well camoflaged, but you retain the 'Union Jack' hatchway - surely a contradiction.
Also I was also disappointed you retained the physical comedy at the end of the Paris car chase. Bond landing in a wedding cake isn't funny on screen or on the page. I'd have enjoyed the sequence more if May Day had parachuted straight into the speedboat and vanished down the Seine, leaving Bond exasperated on the bridge.
There's really no need to introduce Zorin or May Day here.
Chapter One deftly builds the mystery of Zorin and his entourage; by featuring them at the climax of the chase you (like the film makers) have instantly removed all the mystery and tension surrounding your villainous characters.
I don't know if you've read Wood's JB, TSWLM and JB&MR, but they are excellent examples of how to adapt a screenplay into a novel. Benson's and Gardner's straight forward re-tellings are not.
For all that, Chris, a sterling job. These are minor quibbles. I can't fault much of your prose. The attention to action and detail is excellent and I enjoyed it immensely. I'm looking forward to the rest.