The aircraft landed on Runway 23 at Glasgow in calm weather conditions. During the flare there was a continuous progressive aft sidestick control input, which was maintained after touchdown. The aircraft bounced slightly and the nose-up pitch continued to increase, reaching a maximum recorded value of 9.5° at the second touchdown. The aft fuselage and aft galley drain mast contacted the runway surface. The flight crew were not aware there had been a tailstrike until after their arrival on stand, when the damage was reported by a ground crew member.