The GCHQ Puzzle Book contains a cryptic crossword first published in the Daily Telegraph in January 1942.
It is thought to have been used to recruit code breakers to Bletchley Park during World War II.
You can download the answers to this here
There is a mistake in the explanation of ‘Where’ questions on page 148. In the second line of the table at the top of the page ‘Samuel L’ and ‘JACKSON’ should be to the left of ‘Sheep’ and ‘BLACK’, so that Samuel is in the right place in alphabetical order.
Part (c): Af should be AF, and (A) should be CA). So the top of the first fraction should be AF x (BF+AF-CA)
“Ewan MacGregor” is the incorrect spelling, this should be “Ewan McGregor”
The date given in part (e) should be 1974, not 1998
The answer to 8 across should have six squares rather than five
The marks are incorrectly stated as (1,1,1). This should read (1,2)
‘Chowringhee Lane’ appears erroneously in section (a)
The 8th row in the Word Hunting grid should end
The Kristmas Kwiz Challenge is a chance to attempt the annual GCHQ Kristmas Kwiz under the same conditions that their staff do.
You'll find it on page 121 of The GCHQ Puzzle Book.
Answers to the Kristmas Kwiz Challenge were published here on April 1st 2017 and can be viewed in this attached PDF: