According to sources, the two parties have been in talks for seat sharing for almost a year and have finalised their formula. The two parties will contest elections on equal seats, sources. The Rashtriya Lok Dal (RLD), which has its base in western UP, will also be a part of the alliance. An official announcement is likely to be made in this regard on January 15, 2019, when BSP supremo Mayawati celebrates her birthday, sources said.