[3] Next year, together with NME writer Paul Morley they founded ZTT Records[8] which soon boomed into success.
[9] In the same year Sinclair and Horn acquired Basing Street Studios from Island Records in exchange for distributing the ZTT label.
ZTT's first major signing was Frankie Goes to Hollywood, whose hits "Relax" and "Two Tribes" were among the most influential and best-selling singles of the decade.
[10] In 1984, the Horn-Sinclair family businesses were reorganised as SPZ Group, which then consisted of Sarm Studios, Perfect Songs and ZTT records.
[2] The latter part of the decade was eclipsed by the bitter legal battle between ZTT and Holly Johnson who fought his way out of the strict, long recording agreement.
In 1987 her brother John moved to Israel to become a rabbi and has not been involved in the Sinclair family's music business since the 1990s.
[1] She married music producer Trevor Horn in 1980 and they had four children: two sons, Aaron and William [13] and two daughters, Gabriella and Alexandra.
Communication from ZTT Records confirmed on 1 September 2006 that Jill was in a natural coma and had been moved to a rehabilitation centre.