The logo files have recently been updated by Richard Sarborough. Details are in "2020 Logos Update". It includes a document showing the difference between the old and the new. The new one was simplified and some of the small 'islands' in the stripes have been cleaned up. The New logo was drawn as a vector shape so can scaled to any size where the old one was a rasterised image and subject to issues with resolution.
The .pdf can be opened in Illustrator if needs be so can be scaled to any size. The .png is good up to A5.
For document Templates see: Integrated Management System: Support: Templates