ITV introduced its first official corporate logo and national on-air identity on 1 September 1989; this was an attempt to unify the network under one image while still allowing for regional identity. However, six companies refused to use their versions of the generic ident (Granada Television, TVS, TSW, Anglia Television, Channel Television and Ulster Television), preferring to stick with their distinctive on-screen branding. The companies to use the generic ident for the longest time were Yorkshire Television, who kept it on until 24 October 1994, and Grampian Television, who continued to use it right up until ITV's second corporate logo was introduced on 5 October 1998.