at Sunningdale Nurseries – then the most revered nursery in the country – with Jim Russell. The partners became known for planting schemes that focused on form and foliage, as much as flowers. At Sunningdale, Thomas established his entire collection of roses. It was here also that he began introducing new or rediscovered garden plants – notable introductions from this period include the perennial Geranium 'Claridge Druce'. While Thomas would become associated with many other projects, he would remain a director of the Sunningdale nursery until 1971. Thomas's first important publication about roses was a booklet called The Manual of Shrub Roses, describing all the varieties, with advice on cultivation. In the foreword he described the booklet's aim as: "To bring forth these lovely things from retirement." His classic books on roses – Old Shrub Roses (1955), Shrub Roses Of Today (1962) and Climbing Roses Old And New (1965) followed and cemented his influence. They also provided much-needed information about the history and extent of the genus at a time when old varieties were being overshadowed by their repeat flowering and showier cousins hybrid teas and floribundas. Work with the National Trust Thomas began an informal association with the National Trust in the late 1940s, initially working at Hidcote Manor when it passed to the Trust in 1948. The relationship was formalised when he became its official gardens adviser in 1955. This was a relationship that was to continue for the succeeding 20 years and gave him the opportunity to work with a vast array of plants in spectacular historic settings, such as Sissinghurst Castle and Mount Stewart. It is Mottisfont Abbey – a creation that he himself described as a "masterpiece" – where his rose collection found its final home, and where his garden design skills can be best appreciated. He also assisted with the 1968 restoration of the Sezincote gardens. Gardening accolades and legacy In 1975, Thomas received the OBE for his work with the National Trust. Other awards included the Royal Horticultural Society's Veitch Memorial Medal in 1966 and Victoria Medal of Honour in 1968. He received a Gold Medal from the RHS for his paintings and drawings, the Dean Hole Medal from the Royal National Rose Society and the Garden Writers' Guild Lifetime Achievement Award in 1996. In addition to his garden designs, books and illustrations, Thomas is remembered by name in various garden plants, including