Amid delay in seat-sharing pact with the BJP, Shiv Sena president Uddhav Thackeray has convened a key meeting today to discuss the party's preparations for the October 21 assembly polls in Maharashtra.<br />''<br />'' A party release said today that prominent Sena leaders, office-bearers and ticket aspirants will attend the meeting in Mumbai. District and taluka-level chiefs of the party along with aspirants who were interviewed for poll tickets have been invited for the meeting. Party sources said the Sena is making preparations to contest all the 288 assembly seats in case its alliance talks with the BJP collapse.<br />''<br />'' The Sena meet comes in the background of BJP leaders from the state holding discussion with the central leadership yesterday in New Delhi to assess poll preparedness for all the seats. <br />''  <br />