Christmas lights (Woodford IG8)

I have a half set of Christmas Lights multi coloured lanterns, 40 of the lights work, the other 40 do not, can't find what is wrong, checked all the bulbs and fuse bulb, maybe the cable has broken, would anyone like them to use perhaps on a tree where the half that do not work could be hidden, will include all the spare bulbs (about 20 - including fuse bulbs) in case someone would like to sort them out, they are what are know as Chancery Lights/lanterns

       
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