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Results from recent analyses of the NA48 experiment at CERN are compared withother experiments and confronted with theoretical predictions to provideconstraints on the CKM matrix and on CP Violation.  The observable eta+- is related to the parameters of indirect and direct CPV(eta+- = epsilon + epsilon'). |eta+-| has been determined by measuring theratio of decay rates:  Gamma(K_L to pi+pi-)/Gamma(K_L to pi e nu), using an NA48 run with adedicated pure high-intensity K_L beam.  The main objective of NA48/2 has been to search for direct CP violation byhigh precision measurement of the asymmetry A_g = (g+ - g-)/(g+ + g-) of thelinear slope parameter g in the Dalitz plot of K+- to 3pi decays. The finalresults from all data samples are summarised and discussed.  The decay rates R(Ke3/K2pi), R(Kmu3/K2pi) and R(Kmu3/Ke3) have been measuredwith charged K decays from special data samples with a low bias trigger in theNA48/2 experiment. Using the latest PDG average for the (K+- to pi+- pi0)normalisation channel, the Ke3 and Kmu3 branching fractions are then used asinput to deduce the CKM matrix element Vus.

Recent CP violation and |Vus| measurements from the NA48 experiment