The Great Interior Design Challenge

In the first round of the first heat, the group of amateurs taking on the design challenge are hairdresser Oliver, dog walker Katie and photographer Daniela. They must each transform a bedroom in Regency properties in the grand Pittville estate of Cheltenham. Katie, who has a love of all things vintage, has a nervous time trying to please the client with her use of a controversial peach colour scheme which divides the judges. Oliver is being creative trying to bring the outside in when he makes over a tired and unused dreary basement guest room, but he is taking a risk with his design so will he be able to satisfy their dislike of chintz, especially since his clients aren't too sure about his methods, particularly as he plans to incorporate children's toy hula hoops into the lighting? Daniela meanwhile has to design for a younger client but can she satisfy a 12-year-old schoolgirl who is after a sophisticated look for her bedroom? Will Daniela be able to rise to the challenge or has she bitten off more than she can chew? All three try to come up with quirky and innovative designs when they are given a creative challenge - they are each given a surprise item which they have to cleverly incorporate into their scheme within three hours. They each have a thousand pounds, 48 hours and a small team to help deliver their schemes. Who has and who hasn't satisfied the judges? One of them will be going home.

In this round of the first heat, the group of amateurs taking on the design challenge are retired actor and director Nicholas, marketing assistant James and event stylist Anna. They must each transform a living room in three Grade II-listed former workers' cottages in the pretty town of Saltaire. Nicholas is reaching out to his spiritual side as his client wants a Zen-inspired relaxing consulting room, but he may have bitten off more than he can chew and gone too far with an elaborate Japanese-inspired scheme. Will his client like it? Anna meanwhile has to breathe new life into a lacklustre living room for her client, but will she be able to give it a modern masculine bachelor pad makeover? And will the judges think her schemes are manly enough? James also has a testing time trying to fulfil a Scandi brief for his homeowner, but can he finish it to his own high standards? And they have a three-hour window in which to complete this week's creative challenge. They each have a thousand pounds, three days and a small team to help deliver their schemes. Expectations are high from their clients and the judges, and they will decide who has done enough to stay in the competition - and who will go home.

It is the last of the heats and this time our group of amateur designers are transforming rooms in Holly Village, a unique collection of Grade-2 listed properties in north London. Our designers are Richard, an artist from West Yorkshire, Shaida, a freelance makeup artist from Northampton, and Susanne, a solicitor from Loch Lomond in Scotland. They each have the task of transforming a bedroom in imposing Victorian Gothic cottages. Richard is reaching out to his industrial side for his client who wants a chic hotel look, but will his original artwork and use of raw natural materials go down well with his homeowner? Can he finish his bedroom on time and to the homeowner's specification when a delivery goes wrong? Meanwhile, Shaida finds that even though her brief from her client matches her own personality, it doesn't mean that her design will be plain sailing. Working to the specifications and constrictions of period properties proves quite challenging. Will Shaida, who has a love for all things Moorish, be able to marry gothic and romantic into her plans? And a peaceful muted zen-like room is a testing brief for paisley pattern-loving Susanne. Challenged by incorporating the homeowners' bulky furniture and technology, Susanne has to draw on all her design charm to impress. And they have a three-hour window in which to complete this week's creative challenge. They each have a thousand pounds, 48 hours over three days and a small team to help deliver their schemes. Expectations are high from both their clients and the judges. Who has done enough to stay in the competition and who will go home?

It is the quarter-final and the two designers who have made it to this stage now must take on two rooms each. In this heat, our two designers both take on a living room and a sitting room but the stakes are high as Kelly and Daniel must decide who goes through to the semi-final stage. Their budgets have increased as they have £2,000 each for their two rooms, and their team has doubled - they have two builders and two decorators to manage. They have 48 hours across three days but in their toughest challenge yet, one room must be finished and judged on day two. In this episode, our designers are in Worsley near Salford, Manchester, trying to transform rooms in Mock Tudor imposing houses, but will their designs be inkeeping with the properties as well as impress the homeowners? One designer has problems with their waterworks and might not be able to deliver what they have promised, and a delivery mix up means grave lighting issues. For the other designer, a timing issue might hinder their whole design integrity. Both designers draw on their practical and creative resources when they are given some metal tins to enhance but can they rise to the challenge? Meanwhile, architectural historian Tom Dyckhoff discovers hidden tunnels beneath the waterways and looks at what life was like when these houses were originally built.

In the second quarter-final, two designers battle it out for a place in the semi-final. They both have £2,000 to be spent on two rooms and 48 hours across three days in which to complete their challenge. They see their workforce doubled to two decorators and two builders and they really will find out how hard it is to have one room finished and judged on day two. This time, the designers are in the pretty coastal town of Aberaeron in west Wales, a former fishing port. Both designers are tasked with transforming both a bedroom and a study come guest room, whilst incorporating the creative challenge - some rope - into their overall scheme. One designer draws on the surrounding Welsh influences to create their schemes, but will the client like it, especially as there will be a big retro-inspired theme throughout? The other designer finds that a nautical-themed design plan might not be the best option, especially when judges Kelly and Daniel have to step in. Both designers find that having two rooms to complete is extremely physically as well as personally challenging! Meanwhile, architectural historian Tom Dyckhoff explores the coastal village and uncovers its far-reaching architectural influences and finds out why each Georgian house is painted a different colour.

In the last of the quarter-final heats, two designers go head to head for that coveted place in the semi-finals. This time, the amateur designers have two rooms to transform in rather glamorous 1930s art deco flats and they are each handed a living room and a guest bedroom. The designers both have £2,000 and 48 hours across three days in which to complete their challenge. They see their workforce doubled to two decorators and two builders and they find out how hard it is to have one room finished and judged on day two. This is particularly challenging for one of the designers for whom a possible asbestos outbreak means work is halted in one of the rooms. Will they complete their rooms on time, and how will they adapt their design plans to comply with the art deco brief they have been handed? Will a black skirting board be a step too far for the clients and 'mock croc' be too feminine for the 'Gentleman's Club' they had asked for? Meanwhile, the other designer might be going too far off brief with a butterfly-inspired effect which dominates heavily throughout the living room. Both designers are given a creative challenge to cleverly incorporate into their overall schemes and architectural historian Tom Dyckhoff takes us back in time and shows us that 1930s Streatham, meaning 'Hamlet on the Street', was one of London's most forward futuristic glamorous neighbourhoods.

It is the semi-final and two designers go head to head for a place in the grand finale. The pressure is mounting and the stakes are high! In an added twist, one of the designers returning has been given a second chance, having previously been eliminated in the earlier rounds. This designer is now back fighting for their chance to make it into the final! The challenge our two designers have to conquer is transforming two rooms in modern town houses in Bristol. One designer takes on a master bedroom and a guest room/craft room and the other amateur is tasked with redesigning a living room and a bedroom/craft room.

In the penultimate show of the series, the two designers have to transform two rooms in pretty thatched cottages in Ashby St Ledgers. Both designers are tasked with transforming a living room and a dining room. Judging them are regulars Kelly Hoppen and Daniel Hopwood and guest judge Michelle Ogundehin, editor in chief of Elle Decoration. Both designers unwittingly use the same colour but will this help or hinder their chances with the judges? One designer is seriously out to impress, but will the use of a very detailed and overpowering matching blue print for wallpaper and curtains impress the homeowners or put them off? Will Michelle Ogundehin agree with Daniel and Kelly or put a cat amongst the pigeons? Meanwhile, Tom Dyckhoff discovers the beauty and origins of olde world picturesque country cottage living and the characteristics of thatched dwelling.

It is the grand final. The two top designers have to complete three rooms each in converted apartments in an 18th-century mock castle in Broadstairs. The designers are tackling a kitchen for the first time ever and our designers soon find out that working in older properties is certainly not without its challenges. Judging this epic battle are Daniel Hopwood and Kelly Hoppen, helped and joined by former judge and interior stylist Sophie Robinson. Only one designer can walk away as winner of The Great Interior Design Challenge. Meanwhile, architectural historian Tom Dyckhoff explores the castle and explains the significance of such a beautiful building in British history.