Sydney E.R. Wynne, Voice and Vision Ltd., London: internal strains in the United Federal Party and resignations from it; press and broadcasting in the UK; changes at Rhodesia House; American Metal, the Hochschilds, and R.L. Prain, and the financing of United National Independence Party (Northern Rhodesia (Zambia)); crisis in the Northern Rhodesian (Zambian) constitutional negotiations; the Southern Rhodesian (Zimbabwean) referendum, Apr-May 1961