Not much accent-wise to report or comment on from Henley-on -Thames, I"m afraid, although persons from nearby Reading have a readily discernible accent,typified by the excruciatingly awful way in which they pronounce words like "sprouts " ( as in Brussels Sprouts ), which they manage to make sound like the Dutch " ui " sound ( impossible to reproduce in written form ,but perfectly ghastly, I do assure you ). As one progresses further north into Oxfordshire, one encounters something much more akin to a "burr", as personified by the esteemed Pam Ayres----beyond that , it"s all Bandit Country to most of us, I fear, and quite beyond comprehension.