The soldiers were in the Norway Campaign in 1940:
1/5th Battalion, Leicestershire Regiment: Part of the 148th Infantry Brigade that landed at Åndalsnes.
1/8th Battalion, Sherwood Foresters: Also part of the 148th Infantry Brigade.
1st Battalion, York and Lancaster Regiment: Fought in the Battle for Kvam alongside the King's Own Yorkshire Light Infantry.
The British campaign was unsuccessful, so if the men had escaped to neutral Sweden, in theory they should have remained interned until the end of the war in 1945.
Why were they reported no longer interned in 1944?
An unsuccessful campaign and involvement with a neutral power and perhaps early repatriation may be reasons for "Not a publishable cas".
Tony