One clear example, is when you walk down Oxford Street in London, and you´ll hear hundred of people  with different accents and dialects that are nothing like the RP and the Br. Standard that has just been learnt, so, as far as listening comprehension is concerned it´s absolutely essential to my mind to exposure the Ss to as wide a variety of non-standard variations as possible.

Understanding different accents is an important skill for English language learners. English is spoken by people from various countries, and each region may have its own accent and pronunciation patterns. Exposing students to different accents helps develop their listening comprehension skills and prepares them for real-world interactions with English speakers from diverse backgrounds.

Language learners should strive to understand a variety of accents, including those from different English-speaking countries (such as British English, American English, Australian English, etc.) and non-native speakers of English. This exposure helps students adapt to different speech patterns, vocabulary choices, and intonation patterns, ultimately enhancing their overall language proficiency.

 When listening non-native speakers (for example actors, sport men or singers) in the media, due to our training as a teacher, we can recognize their particular accent and we can also get the message or intention. the point is that if we are open to communicate it will take place 

Incorporating the use of L1 as a tool or resource can support students in various ways, fostering a more effective and efficient learning environment, such as comprehension and clarification; vocabulary development; confidence building; error correction and others.