Measurements of the Drell-Yan cross-section provide insight into the structure ofthe proton. Measurements are made at LHCb, via the dimuon channel, as a double differential cross-section with respect to dimuon mass and rapidity, and with respectto dimuon mass and transverse momentum in the ranges 4 20% and (varepsilon_{gamma e^{+}e^{-}}) > 12%, within the fiducial acceptance.