As someone who took part in the filming, I can tell all it was hard work and the limited time of the program dosent really show what went on over the 3 days of filming. Each team captain is miked for the whole 3 days, there are two film crews, and temp film crews around all day. There was a Go pro over each layout and additional photos being taken by production, judges and presenters and 10hours of backstory per team. What you see in the 45minutes is a fraction of the footage available and would warrant a program to each build easily, but what has been shown is what we signed up for.
It would be great to do a big brother style build for a layout to show the interaction of members, because when we did our prep work, it too was great fun and there was lots wine and beer. We've got lots of photos and video that we may make into a video in the future maybe.
It was hard work but great fun, we had the time available and took part.
Will series two look the same, probably not, as the production company learnt a lot. Would I do it again, yes.