so if on every other run i end up with a half tile, i would only end up with 1 hole to nail, so am i best skipping that row and nail every other ( the full tile row)
With some roof tiles you can get "tile and a halfs". If you can get these then you'll still have two nail holes even if you need to do a cut.
Failing that then you're better to still nail the single hole but it's not the end of the world if you skip it, but bear in mind you don't want wind to get in your edge. Perhaps consider fitting some form of dry verge. You can get different types. Ie single tile sized ones which nail on with each course, or a full length one which you nail on before you start.
You would always work full tile - tile'n'half - full tile - tile'n'half etc up the gable verge and work the cut either to the wall or if you are building a twin gable then work the cut into the middle.
On a hip roof you would always start at the hips and cut up the middle.
Ok, got that done, looks nice.
Next question.
I can see how to do step flashing, but how do i go over the ridge tile?
Would i step flash each side, then do the ridge in a seperate piece?
Can't see any photos to get an idea
This detail show the outcome of the flashings near the ridge including the 'saddle' of lead which sits under the ridge and then is sealed by the mortar pointing :
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