Sgt Maj Jennings was a soldier in the 2nd Battalion Royal Warwickshire Regiment, which surrendered to German forces along with troops from the Cheshire Regiment, the Royal Artillery and French troops.
They were taken to a barn in La Plaine au Bois near Wormhout and Esquelbecq in France on 28 May 1940, where SS soldiers threw in stick grenades.
Sgt Maj Jennings threw himself on top of one of the grenades to try to save other soldiers.
More top news
East Midlands weather: Rain tonight, dry tomorrow
West Midlands weather: Rain overnight, drier later
Jenny Drew from Ashby-de-la-Zouch in Leicestershire has managed to save nearly £20,000 over the last three years by collecting coupons.