Nugs

Thanks all, appreciate the advice. Sounds like it all needs replacing. I'm thinking maybe a wide 300mm fibre cement undercloak spanning the cavity wall (not sure about thermal bridging though?) with the shorter than usual battens then overlapping and nailed down. Then fit verge clips and bed the tiles down with a good 100mm strip of 1:3 mortar + unibond. Any better ideas?

Hi All, New here and looking for some guidance.... Recently had the verges on my house reset but the other night 5 tiles blew off in the wind. I've told the roofer about it but he's going for an angle that someone else has been up there painting the roof and has done damage. I've checked all the battens from the loft and there's none damaged and on further inspection (dangling my phone out the window on a pole) I managed to get the attached photo. The undercloacking doesn't go under the battens, there's no nails holding it down, the battens seem short, there's no nails in the tiles and a thin bead of mortar sitting on the outside of the gable wall egde. Looking for advise, is this ok? Seems a little precarious to me. What would you have done different?