[Brekkie]

It's a set - that is it, and far more important pieces of entertainment have been filmed on that very site long before Big Brother - The Shining and the Dambusters had key scenes filmed on the very spot.

In reality Big Brother outgrew it's Elstree base many years ago and should probably moved on around BB7. They managed to make changes to the house in BB9 to give them more internal room but it means ever since the gardens have been on the small side and they still haven't much space to play with in terms of secret rooms, secret houses or going up and adding a second floor.

[Brekkie]

And just to confirm the area known as the Mound is at the top left of this aerial shot - it's the land opposite the BB house:



This isn't a new plan either - it's been knocking about since 2006 to clean out that land and build new studios on it, with plans back then specific in stating the BB house would be retained. There is no reason it won't be now - but if Elstree decided it was in their way you couldn't blame them as they need to plan for future decades while BB's future is probably only a matter of years.