  Complete one-loop electroweak corrections to neutral current Drell-Yan
process $p p \to \ell^+\ell^- X$ are presented for the case of longitudinal
polarization of initial particles. Cross sections for longitudinally polarized
protons allow us to estimate different combinations of polarized quark
distributions from single- and double-spin asymmetries. Numerical impact of
electroweak next-order corrections to asymmetries as function of the vector
boson rapidity and lepton pseudorapidities in the hadron-hadron centre-of-mass
frame using the MC generator ReneSANCe is thoroughly studied.
