I am extremely skeptical, especially since the seller has recently sold another fully signed Never mind The Bollocks (also attached)... and I have only seen one that has come up to be authentic. Anyway, hope the discussion makes its way to bidder or potential bidders.
Ink looks to fresh, and signatures look slowly placed...my two cents
https://www.ebay.co.uk/itm/Sex-Pistols-Pretty-Vacant-No-Fun-7-Pic-S...