Singers plucked from an Oxford estate for a television experiment face their harshest critics and their biggest fans when they perform their first concert on Saturday.

Television talent-spotters chose 40 of the best singers from Blackbird Leys and Greater Leys in Oxford for a documentary to train a the choir to perform at the Royal Albert Hall.

The classical choir, which includes a bingo caller, a bouncer and a cleaner, will now perform its first major concert in front 250 guests at Blackbird Leys Park on Saturday.

The chorus face their biggest challenge yet after combining their vocal talents to perform at the Kassam Stadium, share a recording studio with classical boy-band G4 and entertain passers-by in Verona, Italy, in the past two months.

Producer Helen Nightingale said: "What's been great about the choir is to see their confidence building every time they face a new challenge.

"It was a big shock to sing at the Kassam Stadium, they were frightened, but they did it and they were elated.

"In Verona they had to perform in public and it didn't go very well.

"They were disappointed that they had let themselves down and let Ivor down so they are going to put it right this time. It's not just about the television show.

"They've got their harshest critics there on Saturday their family and friends."

The choir will perform to of 250 friends, family and guests including Lord Mayor Bob Price and under the gaze of the television cameras in a marquee from 3pm.

The Community Concert is expected to last 45 minutes and will be the choir's first scheduled gig.

Singers have this week rehearsed with conductor Ivor Setterfield and will sing O Fortuna from Carmina Burana by Carl Orff.

The chorus is training ahead of a performance at a Classic FM concert at the Royal Albert Hall alongside G4 on Monday, April 24.

Auditions were held in Blackbird Leys throughout January and February to find the best and most promising singers living or working on the estate.

The results of the months of hard work will be screened in a documentary called Ivor's Choir on Five in the summer. The project is part of a scheme by the channel and the Arts Council, to promote the arts in Oxford throughout the year.

Admission to Saturday's concert is by invitation only.