Llechwedd Slate Mine, Gwynedd

Episode 1

Episode 2

Episode 3

Episode 4

Episode 5

Episode 6

Episode 7

Episode 8

Episode 9

Episode 10

Episode 11

Episode 12

Episode 13

Episode 14

Episode 15

Episode 16

Episode 17

Episode 18

Episode 19

Episode 20

Episode 21

Episode 22

Episode 23

Episode 24

Episode 25

Episode 26

Episode 27

Episode 28

Episode 29

Episode 30

Episode 31