Bose-Einstein correlations in hadronic W decays at LEP

Both experimentalists and theorists dealing with Bose-Einstein correlations (BEC) in high energy interactions find themselves in an awkward situation. The observation of a very weak BEC signal between two hadronizing sources in the reaction e/sup positive /sup negative rarr; Wthe BEC effect is quite poor. In this paper, an overview of the latest LEP results on BEC between particles from different Ws is given. From the combination of these results, a systematic uncertainty on the measured W mass in the fully hadronic channel is estimated.