The Oxford Dictionary of Pronunciation for Current English, to give it its full title, was published by OUP in 2001, edited by Clive Upton, William A. Kretschmar Jr. and Rafal Konopka. It has a longer discussion of intrusive r than either of the other two pronunciation dictionaries.No two ways about that: intrusive r is a “very significant feature judged worthy of inclusion in the model”, and “a firmly established feature of today’s mainstream RP”.
Accordingly we find the possibility of intrusive r indicated through the entries by a parenthesized italic (r). Historically justified linking r, on the other hand, is shown by a parenthesized plain roman (r). As far as I can tell, this is the only use of italicization in the ODP transcriptions. Our potential homophones sawing and soaring are shown like this.The word withdrawal is transcribed in four different ways per variety, with the possibility of intrusive r shown throughout for BrE.This places ODP firmly in the camp of objective description (yesterday’s blog).