I think Rhasidat Adeleke (21) will get a medal in the womens 400m, possibly Silver but hopefully Gold, she won't let the likes of the Polish wan out-smart her again, her main opponent will be Marileidy Paulino (28) from the Dominion republic.
I don't think the womens 4 x 400m relay team or mixed relay team is strong enough to get a medal above Bronze, apart from Adeleke and Sharlene Mawdsley the rest are poor.
The last Olympic Gold medal we won on the track was by Ronnie Delany in 1956 !!