Mr Mweetwa says the UNPD hopes that William Banda will quickly bring in his massive experience to the party.
He says the UPND is happy to have Mr. Banda as a member.
He adds that the coming of Mr. Banda to UPND will strengthen the party making it a stronger opposition political party.
Mr. Mweetwa says the UPND will continue welcoming new members that see it fit to work with it.
Mr. Mweetwa was speaking to QFM News in an interview.