My edition, published by Orion, borrowed from Feilding library, has 370 pages plus 2 pages of credits. Not listed here.
The Goodreads blurb, copied from the back cover, is wrong in the first sentence. (Blurb writers are often wrong.) Iris finds the first message after the new year has pealed out from Big Ben.
The Goodreads heading, above, is also wrong: it should say "it" rather than "It".
Overall impression from a proofreader's viewpoint is "inconsistent punctuation".
Reached page 14 with only one page marked for comment - the one with the word "smushed": "informal•North American", says Google; merger of smash and crush.

Continuing to the end:

p 3 the Danish product is officially "LEGO", not "Lego".
p 41 "that week which" needs comma for non-defining clause
p 59 "between him" should be "between himself"
p 221 5 June is 5 months, not 6, from 1 January
p 231 "very strong tea" for three people from one bag? Not on this planet.
p 240 "who" should be "whom"
p 281: "fragrance" as a verb - only Wiktionary seems to accept that.

A couple of apparent date errors that I didn't have time to document. That sort of error often needs many pages of rereading to confirm.

So, less to grumble about than in most modern books I've read.

Enjoyable descriptions of stately homes.

Satisfactory conclusion; blokes shouldn't take the risk.