Dave O I re-analyzed the data that was used to determine the PRC Length (see alog 9th March, 2014) to see whether it was possilbe to determine the losses in the PRC and hence the Schnupp Asymmetry. The results hint at the Schnupp Asymmetry being around 9.5 cm (See attached report). However the measurement will need to be re-done with the increased signal to noise that was obtained late last week to be certain.