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

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

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

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.

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.

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

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

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

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.

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

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

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

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.

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.

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

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.