The vowels of RP FOOT

Quite uncontroversially, this is realized as a half-close and advanced rounded vowel in all types of RP. The set gives rise to some of the most obvious and frequently-remarked hypercorrections amongst Northern STRUT -speakers striving to acquire RP when, aware that RP STRUT is invariably [Λ], not  , they consciously change their FOOT vowel to [Λ], producing [pΛt] put, [bΛtʃə] butcher.