all investigators agree on is that of . Thus, Sal and sale can be merged as , fail and fowl as , and Val, vale-veil and vowel as . The typical pronunciation of railway is . According to Siversten, and can also join in this neutralisation. They may on the one hand neutralise with respect to one another, so that snarl and smile rhyme, both ending , and Child's Hill is in danger of being mistaken for Charles Hill; or they may go further into a fivefold neutralisation with the one just mentioned, so that pal, pale, foul, snarl and pile all end in . But these developments are evidently restricted to broad Cockney, not being found in London speech in general. A neutralisation discussed by Beaken (1971) and Bowyer (1973), but ignored by Siversten (1960), is that of . It leads to the possibility of doll, dole and dull becoming homophonous as or . Wells' impression is that the doll-dole neutralisation is rather widespread in London, but that involving dull less so. One further possible neutralisation in the environment of a following non-prevocalic is that of and , so that well and whirl become homophonous as . Cockney has been occasionally described as replacing with . For example, (or fwee) instead of three, instead of frosty. Peter Wright, a Survey of English Dialects fieldworker, concluded that this was not a universal feature of Cockneys but that it was more common to hear this in the London area than anywhere else in Britain. This description may also be a result of mishearing the labiodental R as , when it is still a distinct phoneme in Cockney. An unstressed final -ow may be pronounced . In broad Cockney this can be lowered to . This is common to most traditional, Southern English dialects except for those in the West Country. Grammatical features: Use of me instead of my, for example, "At's me book you got 'ere". (where 'ere' means 'there'). It cannot be used when "my" is emphasised; e.g., "At's my book you got 'ere." Use of ain'tUse of double negatives, for example "I didn't see nuffink". By the 1980s and 1990s, most of the features mentioned above had partly spread into more general south-eastern speech, giving the accent called Estuary English; an Estuary speaker will use some but not all of the Cockney sounds. Perception The Cockney accent has long