Jackson, a centre-half who is now playing for Halifax Town, has been negotiating terms for the last 24 hours along with Yorath, who has returned from a spell of coaching in the Lebanon. Yorath worked with Jackson at Bradford City.
The Yorkshire club are four points adrift at the bottom of the First Division, without a win from their first nine matches, and the final straw came last Friday when they lost 2-0 at home to Nottingham Forest.
Horton took over at the McAlpine Stadium in June 1995 following his dismissal by Manchester City after two traumatic years at Maine Road.
Organisers of the World Cup finals in France next year are to make a decision at the end of this month on whether to keep perimeter fences at the stadiums to be used. There has been opposition to fencing, especially in Britain following the Hillsborough disaster, but also from the world game's governing body, Fifa.
The World Cup organising committee wants the fences removed, but local government officials at some towns hosting World Cup matches wanted them to stay up.
Diego Maradona, Eric Cantona and George Weah will lead about 60 players from 30 nations in an anti-racism tournament, "Football against Racism", at Real Madrid's Santiago Bernabeu stadium on Sunday. It will be broadcast to more than 60 countries.
Unfortunately, two players due to appear in the event have become involved in a row over alleged racial abuse during a Spanish League match at the weekend. Deportivo La Coruna's Cameroon-born goalkeeper, Jacques Songo'o, claims he suffered abuse from the Spanish international Fernando Hierro during Sunday's goalless draw in Madrid.
The Luton Town striker Phil Gray has been forced to withdraw from Northern Ireland's squad for Saturday's World Cup tie in Portugal because of an ankle injury. He has been replaced by Stoke City's Gerard McMahon.Reuse content