As Estuary is now spoken so widely, there are inevitably regional variations. These would be hard for non-native speakers to detect as many of the differences are somewhat nuanced. Perhaps the most obvious example of a regional variation is the pronunciation of the word “ask” in north east Kent. People from that area often replace the /k/ with a /t/. “ask” then becomes “arst”. This idiosyncrasy appears to be confined to the areas of the county which are immediately south of the Thames and to the east of the Medway.