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.

The nine remaining interior designers take part in a commercial design challenge to transform London offices. Presented by Alan Carr with judge Michelle Ogundehin.

The eight remaining interior designers take part in a commercial design challenge to transform a country wedding venue in Sussex. Presented by Alan Carr with Judge Michelle Ogundehin.

The six remaining interior designers take part in a commercial design challenge to transform shop interiors. Presented by Alan Carr with Judge Michelle Ogundehin.

The five remaining interior designers are challenged to transform beach huts on the Essex coast.

The four remaining designers are challenged to transform two hair salons in Richmond, London. Presented by Alan Carr, with judge Michelle Ogundehin deciding who will go through to the next stage.

The four remaining designers take part are challenged to transform two restaurants in Hebden Bridge.

The two finalists are challenged to transform luxury holiday villas in Cornwall. Presenter Alan Carr and judge Michelle Ogundehin must decide who will be the ultimate winner.

Head judge Michelle Ogundehin challenges the contenders to transform upmarket rental flats in Manchester.

The designers are sent to Wotton House in Surrey, a Grade II listed grand hotel. There they must each update a bedroom in their signature style, incorporating a 'British eccentric' twist.

The remaining eight contenders work on four dated common rooms at Gordano School in Bristol, with two to be eliminated after this challenge.

The six remaining designers are set their next challenge. They are off to the cathedral city of Salisbury to transform three very different shops.

Working solo, the five remaining designers each transform a shepherd's hut on a glamping site in north Wales. The spaces are small, so practicality is key.

In teams of two, the final four designers renovate two cafes in the seaside town of Margate.

The three semi-finalists are challenged to upgrade luxury holiday lodges in the Cotswolds. They must make their mark with some design flair while keeping in the mind the target market.

Having survived seven tough challenges, the two finalists must now redesign two trendy bars in London's Soho.

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.

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 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 three remaining designers return to Brighton to discover their penultimate challenge – a hair salon makeover in Bristol.

The remaining two designers go head-to-head to win a life-changing contract to redesign a top London cocktail bar.

A new batch of interior designers show off their signature style by heading to a former Norfolk convent, turning nuns’ cells into bijoux B&B bedrooms before one wins Stand Out Space.

Nine designers are tested on teamwork as they go wild at Chester Zoo, creating three activity centres for schoolchildren, themed around the wildlife of Brazil, India and Madagascar.

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 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 semi-finalists transform dressing rooms at OVO Arena Wembley, and pop princess Sophie Ellis-Bextor joins Michelle to decide who will go through to the final.

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

Six famous faces join Alan for a fun-filled makeover to raise money by transforming a young carers project in the Midlands before the judges decide who will win Stand Out Space.

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

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

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.

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

The designers hit the high street, doing up shops in Rye. Working in teams, they transform an Indian paper shop and a women’s boutique before being critiqued by Mary Portas.

The three semi-finalists need to put on their best performance as they head to Edinburgh to transform Festival Fringe venues for a place in the final.

The finalists transform holiday cottages in the whimsical and colourful village of Portmeirion before one of them wins Interior Design Masters and a contract with John Lewis.