National Planning Framework 4 (www.gov.scot)
To me, this is important and seems to be getting missed. I found it as I was researching NPF4 13 to reduce car parking obligations for an in-town development (design for pedestrian, cycling to be supported, 20-min neighbourhoods).
NPF4 introduced a new requirement that huts "will" be supported with some obligations on the part of the hutter (following the Good Practice being the main requirement).
This is a huge leap over "to be encouraged" or whatever get-out the councils had for 10 years.
When a Hut application is refused, Appeal. Cite NPF4 30 (d). State clearly that your hut is compatible with the surrounding area, in nature and scale. Attach the Good Practice Guidance. The Gov has given you the words to put, precisely in any Appeal. Add no superfuous bumf about your hut being for yoga or feeding squirrels: give them no room to wriggle. Just the facts. NPF4 30 (d).
follow up to my "to be encouraged" comment. I looked at the 2014 SPP and all it required (79) [Local Development] Plans should set out a spatial strategy which : .... where appropriate, sets out policies and proposals for leisure accommodation, such as holiday units, caravans, and huts
Councils had the get out of waiting until their next LDP to add "huts". Given LDP are every 5 years with 2 years of faff to draft and implement it was a long wait to get even the LDP to acknowledge huts. And, then, the council had carte-blanche to decide on "appropriate" and "policies".
NPF4 appears to remove this. Now, they (Councils) "will" permit huts and the Gov has defined the appropriateness test as good practice.