Following Brian's information about the Collins Pony Library edition of Black Hunting Whip,
I checked my copies of Cargo of Horses and No Entry. All these are exact copies
of the Armada editions, and are therefore abridged. The Pony Library edition of Wish for a Pony
is not abridged, but has the Capitalisation of stressed talk of the original text replaced by the more standard use of italics.
The Collins Laurel and Gold edition of Wish for a Pony is not abridged,
but that of The Summer of the Great Secret is.
The Scottie paperback edition of Black Hunting Whip has nothing cut from the first two chapters so I assume is not abridged.
The Chivers New Portway editions of Strangers to the Marsh and
Operation Seabird are not abridged.