Ww Production, Polarisation and Spin Correlations at Lep

During the data taking years from 1996 to 2000 the LEP2 program has delivered ee interactions at centre of mass energies ranging from 161 to 207 GeV. In this period the four LEP experiments (ALEPH, DELPHI, L3, OPAL) have collected a total integrated luminosity of almost 3 fb. The LEP2 data yielded about 40,000 W pair events, reconstructed in all their decay channels. Event rates allowed measurements of the W pair partial and total cross sections at different energies, as well as of W decay branching fractions. Further, the study of the W pair decay products kinematics allowed determinations of the W polarisation states, and of correlations among the two W bosons.