Field Marshal Sarath Fonseka's Democratic Party will join the United National Party on Wednesday, political sources said.

A MoU is expected to be signed between the two parties on Wednesday, formalising the joining of the DP to the UNP.

Fonseka is likely to be appointed as a national list MP in the coming days. He will occupy the seat left vacant by the demise of the former Minister of Lands MKADS Gunawardena.