The United National Party will hold a crucial discussion tomorrow on the formation of the proposed grand alliance for the next Presidential election.

The discussion will take place at Temple Trees, Colombo, under the auspices of Prime Minister Ranil Wickremesinghe.

All senior members of the ruling party have been invited to attend the meeting, informed political sources said.

Prime Minister Ranil Wickremesinghe previously said the proposed alliance would be formed before the end of this month.

However, the formation of the alliance still hangs in the balance due to the UNP's indecisiveness on the Presidential candidate.