It's British, it's mostly from the North, and it's essentially a second wave of '90s Speed Garage (which itself was a style of uptempo, bass-heavy house music drawing from 2-Step, Jungle, and R&B). Much like Dubstep, Bassline is a new reinterpretation of these influences. It sounds pretty much like the name: fast, garridgey house tunes with HUGE basslines.
In keeping with the rest of those scenes, the demographics in Bassline tend to be pretty working class: black youts of west indian descent and chavvy white guys in track suits, along with your standard mix of art school hipsters and post-jungle/breakcore rave burnouts. I ADORE THIS COMBO.
Sadly, Bassline seems to be on the wane. In London & the rest of the south it's been completely supplanted by UK Funky; I imagine it's still got a strong fanbase Up Norf, but I couldn't say for sure.
Anywho, here's a little retrospective of what I've been listening to in the past couple of years. By no means a definitive look at the "classics" of the genre—just what I think is good.
Chrissy Murderbot's Year of Mixtapes Week 29: Bassline House.
- Piddy Py feat. MNT; Get Loco
- Mr. Virgo; Hypnotiq
- The Wideboys feat. Sarah Saville; What You're Thinking (Up Norf Dutty Mix)
- Jagged Edge; Walked Outta Heaven (Burgaboy Remix)
- Wittyboy; Curry House
- Dexplicit; Karma (Dex Mix)
- A1 Bassline feat. Safi; Girl Thing
- Jinder; Youth Blood (Squire of Gothos Remix)
- Brett Maverick feat. NE1; Chop Of Them
- DS1; Lock Off
- DJ Murkz; Datz Me
- N.B. Funky; Nutz (Bassline Remix)
- Ace Of Base; All That She Wants (Dexplicit Remix)
- Blackstar; Time & Time Again
- Dizzee Rascal; Sirens (Big Ang Remix)
- Mr. V; Motherfuckers
- Luniz; I Got 5 On It (B.U.N. Remix)
- Mask; Gangster
- DJ Q; Gangsters
- Subzero; Bring It Back
- Perempay & Dee feat. Katie Pearl; In The Air (Rekless Mix)
- The Wideboys; Project Bassline
- Rubi Dan & The Heatwave / DJ Q; Walk & Wine (Dutty Wine)
- DJ Q; Love Like This
- Diamond feat. Terri Walker; I Think I'm In Love (Burgaboy Remix)
- Piddy Py; Leekers
- Natasha Bedingfield; Single (Delinquent Remix)
- WunnaDemWuns; I Feel (Wittyboy Remix)