The house was then bought by Charles Armytage-Moore, founder partner in the stockbrokers Buckmaster & Moore. He reconstructed the main facade in Queen Anne style, and enhanced the gardens with rare rhododendrons, camellias, azaleas and magnolias. One particular red-flowered species (Rhododendron barbatum Wallich ex G. Don 1834) won an Award of Merit when exhibited by Winterfold House in 1934. During World War II Winterfold was requisitioned by the Government and used by the Special Operations Executive (SOE) as a training school designated STS 4. Amongst the many recruits that attended Winterfold were Violette Szabo GC.