We discuss the impact of corrections beyond the leading-logarithmic accuracy on some recently
proposed LHC observables that are based on azimuthal-angle ratios in a kinematical setup that is
an extension to the usual one for Mueller-Navelet jets, after requiring an extra tagged jet in central
regions of rapidity. The corrections tend to be mild which suggests that these observables are an
excellent way to probe the onset of BFKL effects at hadronic colliders.