Possible Costume CLothing (Suitable for Am Dram) (North Sheen TW9)

I found these items of clothing while clearing a relative's house. I would assume these date from the 1960s or 70s. I thought they might be suitable for an Am Dram Group or something, hence offering them here

1. Petticoat or Nightdress (not sure which). It is for a tall and very slim person. Its like about a Size 10, an as you can see from the picture it is quite long.
2. Halter Neck Sundress, Probably 1960s or 70s style (though I am wondering if it could look 1950s ish. This two would be about a Size 12 or 14.
3. Two vintage fur hats (probably from the 1960s (one is sheepskin, I think the other is probably rabbit) .