We've always had this dream, right from the Trust taking this property over in 1977,
to have hydropower back here again, 
so we can proudly boast that Cragside was the first house in the world to be lit by hydroelectricy, and still is. 
We'll be using the landscape, just as Armstrong used bringing the water down into Tumbleton Lake,
which is the lake that Lord Armstrong created here at Cragside, and that'll be the fuel tank,
to fuel this wonderful Archimedean screw system.
I've been at Cragside for 25 years, and we've been talking about it all that time.
So it's a realisation of a personal dream, for me.
The Archimedes screw, here at Cragside, is a fantastic project,
because it's not only generating clean energy, but it's also helping to protect a really special place.
At the National Trust, we're trying to generate half of the energy that we use from renewable sources,
like sunshine and water, by 2020.
So our teams have to work really hard to make sure that all of the clean energy schemes that we do build,
are just right for the place that they're in, which is exactly what we've done here at Cragside.
Armstrong had been passionate about water, right from 1835,
when he gave a great speech about the monstrous waste of coal in this country,
and how the coal would be exhausted in 200 years,
and he thought water power was the solution to that.
Here at Cragside, he developed hydroelectricity,
and he developed that along with Dr Siemens, one of his great friends,
and another great friend, Joseph Swan, of course,
eventually developed the incandescent light bulb,
and of course it was all for free.
It was free electric, because it was being powered by water power.
