Question: What is the highest BR number with a SECR number of 765?
SQL: SELECT MAX("BR No.") FROM "2-17607663-1" WHERE "SECR No." = 765.0;

Question: What is Beyer Peacock's SR number with a SECR number of 769?
SQL: SELECT AVG("SR No.") FROM "2-17607663-1" WHERE "Builder" = 'Beyer Peacock' AND "SECR No." = 769.0;