T-glottalization is a process that occurs for many English speakers, that causes the phoneme /t/ to be pronounced as the glottal stop [ʔ] in certain positions. In RP, /t/ can be pronounced as a glottal stop when occurring before a consonant leading to pronunciations like: not now - [nɒʔnaʊ] department - [dəpɑ:ʔmɪnt] lighthouse - [laɪʔhaʊs] Among younger RP-speakers t-glottalization can also be heard finally before… (More on T-glottalization)