By the way, you may have noticed the Dublin skinheads in photos 1 and 3 have a 'flare problem'. I reckon this wasn't uncommon with leftover skins after 1971, especially in remote towns.
I remember watching a BBC documentary from the 1970s on an old VHS tape many moons ago. It was typical 70s sociological fare, investigating the daily life of an unemployed skinhead in some British smalltown. One thing I remember is that his creative outlet was drawing pinup girls. The other, he wore flares with his DMs, crop, Ben Sherman, and braces. Unless memory deceives me, they were flares rather than just jeans that seemed too wide for my modern sensibilities or anything like that.
I'd guess the documentary predated the revival and might have been shot anytime between 1972 and, say, 1976. If the above rings a bell and you've got a link to it, I'd be grateful.
Apparently the flare problem persisted into the revival period. The picture below was taken in Soho in 1979 and posted here a couple of months ago.
In a 1978 article, a revivalist skinhead called John Butler is quoted as saying, "I can't stand the dopey skins you see now with big flares. Skin'eads with flares, it don't look right, does it?".