Songfacts®:

• Here, Dave Omoregie details his journey from growing up on the streets of Streatham in South London to becoming one of the UK's leading rap stars. Now he can afford the best cars ("This DBX is what I'm whipping") and luxury vacations ("Trips to Calabasas"), but he still remembers his roots ("Mummy's working in a hospital").
• Kamal croons the hook and outro, during which he alludes to being a poisonous lover like the toxic metal mercury.
  
  Sirens sing so perfectly
  But I'm poison like mercury
  
  Northwest London native Kamal Prescod is an R&B singer-songwriter, who released his first single, "smilingdownthephone," in 2019.
• Dave released this song alongside "Titanium" on April 10, 2021 as standalone singles. He states at the end of his second verse that "Mercury" didn't make it onto his upcoming album. The implication is that if a song as good as this one didn't get onto the tracklisting, his next record must be full of bangers.
• Dave and Kamal wrote the song alongside the track's co-producers, Manny Manhattan (YFN Lucci's "6 Years Later") and Kyle Evans (who also co-produced "Titanium").