At least, you have saved some of your father's history. How many others have sold, given away or just dumped something only to regret it later, I know have and not just the once!
Another attempt to get ahead of you but I'm probably still in second place .
The first 2 links are reports from local papers. The son and grandson of Lovat Scout piper Bill Millin are in 2 photos in the first one.
The other 2 links maybe a source of information.
http://www.edp24.co.uk/news/west-norfolk-event-for-lovat-scouts-1-5592140
https://www.lynnnews.co.uk/news/new-memorial-to-honour-the-lovat-scouts-9002061/
https://www.totalgiving.co.uk/charity/lovat-scouts-regimental-association
http://www.rootschat.com/forum/index.php?topic=623886.0