Just thought I'd relate some information and photographs that I have turned up on three Mackenzie courses in England.
CLEETHORPES GCThe first of these is Cleethorpes GC, near Grismby on Lincolnshire's eastern coast, and until 1930 was known as Grimsby & Cleethorpes GC. The course was extended from its original 9 holes to 18 holes in 1903 to a design by Harry Vardon and in 1923 the local council who leased the land to the golf club wanted some of it back. Mackenzie was called in to reconfigure the course, which Carters built at a cost of 2000 pounds. It is not clear whether he was given additional land or had to make do. Construction work was completed in April 1924. In 1929 a series of photographs were taken - presumably for a golf club handbook - and these are reproduced in the club history book. Cleethorpes has not been previously recognised in any of the lists in Cornish and Whitten, Doak et al and Hawtree as being a Mackenzie design. Until I acquired a copy of the history book I was unsure, but upon seeing the 1929 photos there can be little doubt. Looks like two of the greens in the photos are simple rectangles and were presumably some of the old greens that were not altered.
STANMORE GCThis London course was reconstructed after WW1 by Mackenzie, although there is very little information about what he did. He included Stanmore in the list of courses in his 1923 brochure that he issued after splitting from Colt and Alison. There is a photo hiding down the back of the history book of the clubhouse and 18th green/bunker, looks to be from the 1930s. A more recent shot from the early 1990s was on the cover of the book, it is instructive to see how the bunker has been totally simplified in the ensuing years.
WORCESTER G & CCListed by DSH as a revised course from 1924, as does Hawtree. C&W list as a new course from 1927 and this is closer to the mark. In fact it was a new course for the club who needed to relocate. Club's centenary booklet from 1998 has some good information. Mackenzie was first approached in 1925 by chairman of greens Dr Norman Duggan to inspect a possible site for their new course at Spetchley Park, and he produced a favourable report for the AGM. That same year Dr Duggan took Mackenzie to visit another site at Boughton Park and Mackenzie was enthusiastic. A Special GM in August 1926 the membership backed the move to Boughton Park and the newly formed company commissioned Mackenzie to design the course. A Course Construction Committee was formed to liaise with the architect Dr Mackenzie and the the Golf Construction Company, the contractors (presumably the British Golf Course Construction Company). By the AGM of March 1927 construction commenced. By late summer of 1927 construction was virtually complete when the construction company left. The new course opened officially on Whitsaturday 1928.
There are some nice photographs in the booklet, highlighting Mackenzie's bunkering, possibly these were originally in the form of postcards.