Foxes and tawny owls patrol its leafy lanes, woodpeckers flit through the trees, and rare birds like firecrests are known to breed here. It's an island of green in a sea of concrete and it's right in the middle of London.

Thought you might also like a few photos of the crew and equipment behind the scenes...

Before dawn, we headed out on to the Solway Firth. Thousands of barnacle geese were out on their roost on the mudflats. Suddenly, I saw a peregrine falcon swoop over them, and the entire flock took to the air. They flew low over our heads in beautiful morning light, calling to their family members as they went. It was magical - a true spectacle of autumn.

We spent the rest of the day filming barnacle geese around the reserve. We felt a real sense of connection with these birds which we had last seen in the high Arctic. We're all looking forward to Friday's show and sharing this wonderful experience with you.

Thousands of barnacle geese were preparing to leave their summer breeding grounds and begin their long migration to our shores. So I flew up to Svalbard, an archipelago of islands in the high Arctic, hoping to try to see some of the geese before they set off.

My guide advised me to travel to the barnacle geese breeding grounds, but the birds had long gone. Now I really started to worry. But the Wildfowl and Wetlands Trust has fitted four birds with satellite transmitters, which had given their position six days previously. So I was able to see where the birds had been a few days before.

Next morning, having sailed through the night to a remote bay, we woke at 6am and almost immediately heard the unmistakable honking of geese in flight. Bingo! The goose chase had paid off. Some of the very same birds that would make the journey 1,500 miles or so to the Solway Firth in the Scottish Borders.

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At the end of September and through October, female red deer - known as hinds - come into season. The males or stags gather to fight for the chance of mating with them. We've set up our cameras on a hill overlooking one of the best grazing areas in the Glen called the Village Green. The hinds have moved in to feed, quickly followed by the stags.

This year, our main contenders are: Titus, a big male who's already gathered a harem of hinds. Caligula, not the most handsome fellow, with eyes that seem to be popping out of his head, but strong all the same.

Then there's Attila - with only one scrawny spike for an antler. You wouldn't think he had any chance in a fight but his antler is long, thin and dagger-like, and could easily get through an opponent's guard. He's killed competitors in the past, and could do so again.

But the Lord of the Glen - for the moment at least - is Percy. He may be old (perhaps 14 years, which is really getting on for a red deer stag) but he's managing to hold a large area of territory, and lots of females.