Solarstone & JES – Like A Waterfall, 2006

Trance emerged as a form of electronic dance music around 1990, with the advent of music that was essentially techno or house, but had simplified percussion, extreme repetition, and other hypnotic effects such as sustained chords and long echoes. In trance's early years (1990-1992), it wasn't always clear whether a track was just "trancey" techno (or even beat-laden "ambient" or "deep" house), or was actually an example of what would later be called simply "trance". Consequently, such music might be tagged as (for example) both Trance and Techno. Example artists in this category and time period include The Shamen, Psychick Warriors Ov Gaia, The Irresistible Force, and Speedy J. From the New Beat scene, Age of Love's 1990 self-titled hit single is sometimes pointed to as the earliest "pure" trance track.

Similarly, some tracks from the Acid House era,

[ Solarstone ] - (Richard Mowatt, born 1972, commonly known by his stage name Solarstone), is a British trance DJ and producer based in Birmingham and Wales. The music project Solarstone was founded in 1997 as a trio, and also used the pseudonyms Young Parisians, Liquid State and Z2. Over the years, Solarstone has developed a reputation for keeping to the original and classic trance sound. Mowatt is considered to be a veteran by fans in the trance music scene.
Solarstone has produced and released trance, progressive and chillout music since 1997. Originally a group consisting of Richard Mowatt, Sam Tierney (1996-1997) and Andy Bury (1997-2006). Solarstone became Mowatt's solo project after the departure of Bury.
[ wikipedia ]

Progressive House's roots are primarily in the U.K. in the beginning of the '90s, typified by producers like William Orbit, with his Guerilla label, and Leftfield, with their Hard Hands label. Two British DJs, Sasha & John Digweed helped popularize the sound in the club "Renaissance". The label Limbo Records launched from legendary Glasgow record store 23rd Precinct was also a major actor of the style. One of the biggest hits of the genre was "Passion" by Gat Decor.

Typical elements of the style are house rhythms around 125 BPM; a dubby, galloping/chugging bassline; and a dreamy, spacey atmosphere. In a sense, it is a combination of house and trance, with the soulful, booty-shaking elements toned down and replaced by long chords and dubby ear candy. It evolved into a more minimalistic aesthetic with the emergence of a new scene