A venue for talks and exhibitions called Oak Barn was opened by the television gardener Alan Titchmarsh in 2005. Chatsworth also runs two annual rural-skills weeks, in which demonstrations of agricultural and forestry are given to groups of schoolchildren on the estate farms and woods. In 2001, the ashes of Air Vice Marshal James Edgar Johnson , DL, a Second World War flying ace, were scattered on the Chatsworth estate. There is a bench dedicated to his memory at his favourite fishing spot on the estate; the inscription reads "In Memory of a Fisherman". Estate Chatsworth is the hub of a agricultural estate. This, together with around Bolton Abbey in Yorkshire (mostly moorland) and some land in Eastbourne and Carlisle belongs to The Trustees of Chatsworth Settlement, a family trust established in 1946. The Duke and other members of the family are entitled to the income. The family's Lismore Castle estate in Ireland is held in a separate trust. The estate includes dozens of tenanted farms and over 450 houses and flats. There are five sub-estates scattered across Derbyshire: The Main Estate is a compact block of around the house, including the park and many properties in the villages of Baslow, Pilsley, Edensor, Beeley, and Calton Lees. The West Estate is of scattered high ground, mostly in the Peak District and partly in Staffordshire. Hartington, from which the family takes its secondary title is nearby. The Shottle Estate is in and around Shottle, which is around south of Chatsworth. This low-lying land is home to most of the dairy farms on the estate and also has some arable farms. The Staveley Estate at Staveley near Chesterfield includes a industrial site called Staveley Work, let to various tenants, and some woodlands and arable farms. The Scarcliffe Estate, mostly arable farms, is east of Chesterfield. The Chatsworth Settlement has a range of sources of income in addition to agricultural rents. Several thousand acres, mostly round Chatsworth and on the Staveley estate, are farmed in hand. Several properties can be rented as holiday cottages, including Bess of Hardwick's Hunting Tower in the park. Several quarries produce limestone and other minerals. The 11th Duke and Duchess did not opt for a "theme park" approach to modernising a country estate. They eschewed the traditional aristocratic reluctance to participate in commerce. The Chatsworth Farm Shop is a large enterprise employing over a hundred. A 90-seat restaurant