  The aim of this note is to characterize briefly main components of
theoretical error of the small angle Bhabha measurement at LEP and to discuss
critically how solid these estimates really are, from todays perspective. We
conclude that the existing theoretical error of the LEP luminometer process
(small angle Bhabha) is rather solid, and we add some new discussion concerning
the remaining uncertainties and prospects of the future improvements toward the
$\le 0.025%$ precision.
