Previous studies have shown that English may have “morphological geminates” across morpheme or word boundaries (e.g. right time, unnecessary). Gemination may be seen as a process of phonetic doubling or – more appropriately for English – of phonetic length (Kaye 2005). These studies have focused on prefixed words with the possible gemination of [l, n, m] (e.g. illegal, immoral, unnamed). Previous studies have shown that English does have consonantal gemination in semantically compositional prefixed words, although it may vary depending on: speech rate the productivity of the prefix relative frequency the presence of stress on the following syllable None of the previous studies has dealt with the gemination of /r/. Dabouis (2016) has found that pronunciation dictionaries report a difference between RP and GA regarding the possibility of /r/-gemination: → it would be possible to have geminated /r/s in GA, but not in RP in words such as irrational or irremovable. Aims: Check whether or not the difference between British English and American English can be confirmed using speech data. If attested, evaluate whether the gemination of /r/ depends on the same variables as those found for other consonants. Try to determine whether or not we can assume that speakers have two underlying /r/s, even if these are not systematically realised.