https://www.gov.uk/government/publications/mod-copyright-licensing-information

The PDF MOD copyright licensing information, ststes you can not copy certain MOD crowns period....then there are other PDFs that have those crowns available for license?....This is expensive either way... I wonder what this may do to modeling decals...

Based on what I saw and read, any model and/or decal producer would, for example, woud have to acquire license to print and use the roundel on any decal sheet.

I am am not sure how long this has been in place, it does look like sinece 2012, and recently updated. Not sure how it would impact the production of models/decals outside of UK, but could have an impact on those produced and/or sold in the UK.