Open Country

Tughall Mill in Northumberland has just been bought by the National Trust for £1.5million so what do you get for that amount of money? Helen Mark gets an exclusive first look around the 200 acre site which includes a stretch of the coast which is home to a breeding colony of little terns - our second rarest seabird. She meets the rangers who've been camping on the shore for months protecting the terns from tides and predators - using an interesting array of defence methods. Beyond the shoreline lies a working farm and a mixture of pasture, woodland and the Long Nanny burn which the Trust is currently surveying to identify which species nest at the site. The land used to belong to the Duke of Northumberland estates and is home to a historic mill. Esteemed poet Katrina Porteous lives nearby and has taken a keen interest in the buildings, along with Harry Beamish. They join Helen to explore the buildings while the Trust decides what might happen to them. Presented by Helen Mark Produced by Anne-Marie Bullock.

Helen Mark swaps her anorak for a frock as she visits the summer festival at Glyndebourne to discover how its famous gardens inspire singers, artists and opera-goers. Set within the South Downs National Park, the gardens and surrounding landscape have become an integral part of the experience of going to the opera at Glyndebourne. Garden adviser John Hoyland and the garden team give Helen a tour and share how each distinctive themed area is created and maintained. As the audience begins to arrive for the evening performance, Helen talks to conductor William Christie and singers Danielle de Niese and Joelle Harvey about the unique way music and setting come together at Glyndebourne. She also meets Executive Chairman Gus Christie who introduces her to a recent addition to the local landscape, Glyndebourne's controversial wind turbine, and explains why he's passionate about reducing their carbon emissions. Producer: Sophie Anton.

Helen Mark visits East Anglia's best kept secret, the Brecks around Thetford - a combination of sandy heathland, England's largest lowland forest and some highly productive farms. Scraped clean by the last ice age, the poor sandy soil meant the Brecklands that straddle Norfolk and Suffolk were marginal land, sandy and unproductive. Rabbits were a major industry, reared on vast warrens for meat and fur, their dung collected for fertiliser. Fields were snatched from the heathland for a season, then left fallow to recover. Visiting the large farm operation at Elveden Estate, Helen hears how the use of fertilisers and irrigation has allowed the land to become extremely productive for high value crops like onions, carrots and potatoes. Thetford Forest was planted with conifers after the First World War to create England's largest lowland forest, squeezing out much of the original heathland, home to rare plants and birds, such as the stone curlew. At Weeting Reserve, run by the Norfolk Wildlife Trust, Helen is shown one of these distinctive birds, also known as goggle-eyed plovers. The Brecks is also home to Grimes Graves, a prehistoric flint mine, that provided the highest quality stone implements before the invention of metal. Will Lord, who brings the Brecks' Stone Age past alive for visitors, knaps a great lump of flint into a very sharp hand axe for Helen. To her cost, she finds out just how sharp it is. Producer: Mark Smalley.

Huw Stephens is our guide to the Green Man Festival in the Brecon Beacons. As a DJ Huw has been to many festivals but the Green Man is a favourite. Set in his homeland of Wales the festival is not just about rock music but also about the place in which it is set. This year festival goers are invited to spend time on the site before the music starts to get back to nature and settle into the spirit of the place. Huw meets festival goers, musicians, local food producers and druids to try to understand why hearing music in the great outdoors can be such a powerful experience.

The International Balloon Fiesta in Bristol has been running for nearly 40 years, drawing pilots and tourists form around the world. Helen Mark has been invited to Ashton Court to help launch one of the crafts and take flight in the direction determined by the wind. During the journey she'll find out how so many navigate around one another, and why those involved are so passionate about this way of travelling. Drifting through the skies with her will be 'The Flying Archaeologist' Ben Robinson who can reveal hidden histories in the landscape below that often go unnoticed. But all her plans are at the mercy of the weather. Presented by Helen Mark Produced by Anne-Marie Bullock.

Eliza Carthy is one of England's finest folk performers. In this episode of Open Country Eliza explores her hometown of Robin Hood's Bay on the North Yorkshire coast. Famed for shipwrecks, smugglers and fossils Eliza uncovers the true history of the place she calls home through those who know it's history and secrets best.

Leathers, green beard, a Harley and pension: guest presenter Paul Murphy meets some of the people behind the longest running bike night in the UK. Lincolnshire's roads are long, straight (Roman) and quiet, perfect for motorbikes. Every week between March and October, about a thousand of them ride out in the county for a pub supper and a cup of tea. It's a sight you don't easily forget.Graham Sugdon started Lincolnshire Bike Nights in 1989 when his hair and beard were long and black. He's a third generation biker and hopes he'll be riding into his eighties, like his Dad, Bernard. Frustrated by the 'No Bikers' signs at venues, Graham set out to persuade landlords that bikers could be good customers. Twenty-eight years later he's still organising weekly 'rides out'. It is about landscape - the pleasures of experiencing it at speed.Steve Smith, landlord of the Ferry House Inn in the Trent-side village of Burton upon Stather, always looks forward to bike night. These customers may have tattoos, ZZ top-style hair and green beards, but they're unfailingly polite, their bikes are immaculate and they don't drink and drive. These leather-clad cruisers appreciate a nice bit of landscape.Presenter...Paul Murphy Producer...Mary Ward-Lowery.

Helen Mark is in Perthshire to climb Ben Lawers above Loch Tay for a better view of the southern Highlands. Scotland's 10th highest Munro, it's home to rare alpine wildflowers, and loved by walkers. The landscape's been shaped by centuries of grazing, first by cattle and in more recent times by sheep. Helen visits the sites of the old shielings, the summer dwellings used by farming families after driving their livestock up for the pastures. Back down at loch level, Helen visits the locality's annual Kenmore Highland Games, and finds out what a crannog is. Visiting the Scottish Crannog Centre she learns why these ancient fortified dwellings were built over the lochs, on wooden piles. Up on Ben Lawers overlooking Loch Tay Helen also finds out about the ancient 'cup and ring' markings engraved on boulders long before even the crannogs were built. We might not know their purpose, but that doesn't stop us from guessing. Producer: Mark Smalley.

Ian Marchant associates the landscape at the mouth of the River Lune with his friend and musical partner, Chas Ambler, who died nearly two years ago. In this personal exploration of his connection to the life of the river, Ian talks to poet Paul Farley about how to value un-romantic landscape. He meets Fiona Frank, one of the founder members of the Lancashire Co-Housing project , to discuss living in an 'intentional community' on the banks of the Lune. Lancaster has a little-known connection with the slave trade, which Ian discusses with Anthea Purkis from the city's Maritime Museum. Ian also visits Michelle Stevenson - or Chel - to talk about how she invited Chas to move into her family home at Glasson Dock for the last few weeks of his life, an act of extraordinary generosity. And if that isn't enough to reaffirm his faith in life, Ian meets haaf net fisherwoman, Margaret Owen, at the isolated north bank of the river, Sunderland Point.An unusual, moving and funny edition of Open Country exploring the dark side of the Lune.

For 75 years a stately home near Reading has eavesdropped on the world. As BBC Monitoring changes, Caz Graham hears why the organisation is leaving Caversham. Caz speaks to staff past and present to hear about the vital daily work conducted behind the grand portico, amidst splendid grounds, listening in to and translating radio broadcasts since 1943. Retired staff recall being on shift when major world events occurred, such as the deaths of Stalin, Franco and Brezhnev. With its roots in short wave technology, Caversham's sensitive radio aerials and satellites could be retuned to listen in to countries around the world. Current manager at BBC Monitoring, Chris Greenway, describes the organisation's work today, for example tracking social media and the broadcasting activities of Islamic State (IS). Producer: Mark Smalley.