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
Detectives investigating the unsolved murder of a mother-of-two have obtained a DNA profile which may identify her killer.
Remaining cloudy with outbreaks of showery rain this evening and tonight. Tomorrow will be a day of sunshine and scattered showers
Mainly cloudy with showers this evening. Tomorrow, mainly fine and dry at first before showers develop through the morning.