Hi Archie,
Just thought I would add my comments to your pics, pic 1, Mills grenade baseplugs, the brass one goes with either of the two without the red stripe, could be No5's or 23's. The metal rod goes with the brass plug to enable it to be fired from a rifle. Have a look at this website, it goes into detail
www.millsgrenades.co.uk The diecast plugs would be suitable for the No36 Mk1, the red stripe. No36's in good complete condition, 40-50. No5's and 23's good and complete, 60-70. there are lots of variants, price is just a guide. Pics 2 and 3, Mills grenades, No36, 5 and 23 ? hard to tell without detail. the last item in these pics is a Russian/Warsaw Pact F1 type grenade, the body looks modern but the fuse is WW2 type. Not sure about the cable Tie though !:tinysmile_eyebrow_t I should think that the lever has broken away from the fuse. Not uncoomon, about 30.
Picture 4, a french illumination mine/flare, modern and not hard to find, 15-20.
I am sure you are aware that your stick grenade is a modern reproduction, a good gap filler and ideal for reinactors, I think these cost about 25 brand new, a real one would probaly set you back ten times that amount.
Hope you find this helpful, Tony.