Nassalam ploughed through the Chepstow mud to win the Welsh National and give trainer Gary Moore his third success in an incredible 40 minutes. After conditional jockey Caoilin Quinn had won the Finale Juvenile Hurdle earlier on Salver for the Moore stable and Editeur du Gite had taken Kempton’s Desert Orchid Chase, the six-year-old Nassalam, who was backed into 9-2 …