Technetium-99 is dispersed in the environment from a number of sources, the main ones being nuclear weapons testing, nuclear power plants, nuclear fuel processing facilities and facilities that treat or store radioactive waste. A small scale experimental study has been carried out to provide further evidence that the generic assumption made on the difference between soil to crop transfer factor (TF) values for non-reduced and reduced forms of technetium is valid. Additional soil to crop TFs have also been measured for a range of crops which can be used where more site specific data for UK based radiological assessments are required