"LNER Class A4 4468 Mallard" . "22" . "London and North Eastern Railway (LNER) Class A4 4468 ''Mallard''" . . "no. 4468 ''Mallard''" . . . . . . "LNER Class A4 4468 ''Mallard''" . "Class A4 No.4468 ''Mallard''" . "4468" . "Class A4 4468 ''Mallard''" . "''Mallard''s" . . . "LNER A4 No 4468 ''Mallard''" . "Class A4 No. 4468 ''Mallard''" . . . "Mallard" . . . . "LNER Class A4 4468 Mallard" . . "1938" . "steam locomotive ''Mallard''" . "4468 'Mallard'" . . "1938" . "4468 Mallard" . . "4468 ''Mallard''" . . . "holder of the steam rail-speed record" . "No. 4468 Mallard" . . "21.336" . "record-breaking locomotive" . "60022 ''Mallard''" . "Mallard Train" . "No 4468 Mallard's" . "Mallard's" . . "60022" . "world's fastest steam locomotive" . "60022, 4468" . "LNER Class A4 No. 4468 ''Mallard''" . "3 July 1938" . . "LNER steam locomotive" . "''Mallard''" . "world's fastest locomotive" . .