For the grande finale, the two finalists head to the magnificent Blenheim Palace in Oxfordshire to redesign holiday lodges in the grounds.

The five remaining designers set to work on their smallest spaces to date: five 1930s beachside chalets in Eastbourne. Laurence Llewelyn-Bowen is this challenge's guest judge.

Romance is in the air as the quarter-final challenge involves wedding accommodation on the banks of Rutland Water in the East Midlands.

The designers pair up and hit East Grinstead high street to transform two Grade II listed shops. They need to transform the spaces to impress Mary queen of shops.

The new cohort of interior designers tackle their first challenge, demonstrating their signature style on YHA bunk rooms in the Lake District.

The eight designers pair up to transform luxury retirement apartments in Portsmouth, using their home staging skills to attract baby boomers into buying their forever home.

The designers create a home from home for dogs at Battersea. Sue Perkins helps Michelle judge these transition rooms along with a couple of Pomeranian rescues.

Each designer must make over a hotel room at a five-star golf and spa resort on the banks of the River Clyde in Scotland.

Working in teams of two, the six remaining designers transform three independent shops in Harrogate.

The designers are let loose on exclusive hospitality boxes at Ascot Racecourse, with each creating their own personal interpretation of high-end sophistication and luxury.

The designers head to Wales as they pair up to work their magic on three Swansea cafes, with the briefs varying from 'Scandi' to 'Industrial' to 'Home from Home'.

The five remaining designers come up with clever hacks to show potential tenants how to turn Sheffield rental apartments into homely spaces - without losing their deposit.

The nine designers demonstrate sustainable design by transforming shipping containers into offices in Bristol for start-ups using recycled and repurposed materials.

The designers must create premium hospitality suites at Twickenham for diehard rugby fans by producing a swanky bar and a stylish dining area.

Aspiring interior designers take part in a commercial design challenge to redesign two show homes. Presented by Fearne Cotton, with judges Michelle Ogundehin and Matthew Willamson.

Ten budding interior designers are challenged to transform luxury apartments in London’s Elephant and Castle. Hosted by Alan Carr.

Working in teams of three, the designers make over three classrooms of a children's nursery in Oxfordshire.

The nine remaining interior designers take part in a commercial design challenge to transform hotel rooms. Presented by Fearne Cotton, with judge Michelle Ogundehin and guest judge Jade Jagger.

The eight remaining interior designers take part in a challenge to transform shop interiors. Presented by Fearne Cotton, with judge Michelle Ogundehin and guest judge Mary Portas.

The six remaining interior designers take part in a commercial design challenge to transform university halls of residence. The guest judge is Sophie Robinson.

The interior designers take part in a commercial design challenge to transform holiday lodges. Presented by Fearne Cotton, with judge Michelle Ogundehin and guest judge Abigail Ahern.

The four remaining interior designers take part in a commercial design challenge to transform two restaurants in Bristol, with a place in the semi-finals at stake.

The three remaining interior designers take part in a commercial design challenge to transform three hair salons in Whitstable for a place in the finals.

At last it is the final and with only two designers left, there is everything to play for as two contestants go head to head to battle it out to win the prize of their lives.

Alan Carr hosts a new series of the interior design challenge, in which 10 aspiring designers compete to redesign Oxfordshire show home. Michelle Ogundehin assesses their efforts, and is joined in the first episode by guest judge Laurence Llewelyn-Bowen.