Introduction. The article examines changes taking place in the intonation systems of modern varieties of the English language by analysing the use of the High Rising Terminal (HRT). Received pronunciation (RP), which is recognised as standard pronunciation in the United Kingdom, Australian English accents and Northern Irish English accents (accents of Belfast) have been chosen as the subject for this study. Intonation contours containing the HRT are compared in order to reveal any similar features regarding their realisation and functions. The results of this comparative analysis will show to what extent other varieties of English may be attributed to the changes in the intonation system of the modern RP. The present study is unique in that the material for the comparative analysis of the functions of the HRT includes recordings of spontaneous speech of the speakers of modern English accents. This study is relevant due to the growing interest in the modern changes in the intonation systems of different modern English dialects. The results of the comparative analysis show whether these changes can be considered universal across different English dialects.Methodology and sources. The material for the present study includes audio samples of spontaneous speech represented by dialogues between native speakers of Standard British English, Australian English and Belfast English. The samples containing the HRT have been acoustically analysed. The lexical and communicative context of the samples have been evaluated in order to determine the functions of the phonetic contour.Results and discussion. One of the main findings of this study is a new function of the HRT in RP that has not been found in the classical descriptions of the accent. The acoustic analysis of the realisations of the HRT has also revealed a number of similar features between the modern accents of English analysed in this study.Conclusion. Many changes taking place in modern varieties of English have been caused by globalisation. Even though RP accent is considered to be the standard accent of British English, it is also subject to change.