Great to see these towers in all their glory, i used to work as a recommissioning engineer for National Grid many moons ago, The wooden beams that supported the elements called film were manufactured from a hardwood timber from Cameroon, and the films looked like huge egg cartons , that were glued together using Cyano crylic (super glue)\into blocks about six feet long by two feet square, Stacked ten feet deep onto the hardwood frames laid across the existing concrete beams, Sorry for the rant
Thanks for the images