Starting out as a mid-price catalogue reissue specialist, with labels including The Collector Series and Dojo, it grew into the largest European owner of repertoire outside the major record companies.

It purchased catalogues including Pye, Piccadilly, Bradley's, Bronze, Black Sabbath, Sugar Hill,[2] Transatlantic, Beserkley, All Platinum and Solar.

Starting in the early 1980s, they released compilations and reissued work by Fairport Convention, John Renbourn, Barbara Dickson, Steeleye Span, the Watersons, Richard Thompson, Geoff Turton and many others.

The first signing to the Raw Power label was the NWOBHM act Hell's Belles, releasing their debut album and single in 1985.

It released many videotapes, including TUGS, The Raggy Dolls, Tumbledown Farm, Heathcliff, Alvin and the Chipmunks, You've Been Framed!, the Men of our Time series (documentaries about Hitler, Lenin, Gandhi and Kennedy), a documentary called Falklands War: The Untold Story, The Fugitive, Harry's Game as well as movies Bill & Ted's Excellent Adventure and Phantom of the Opera which, when released to the rental video market, were duplicated/distributed via CBS/Fox Video, acting as Castle's rental sales agent.