ECO A26: English Opening: King's English Variation

ECO A26 is part of volume A, Flank Openings. The Lichess chess-openings dataset files 2 named lines under it. The shortest is English Opening: King's English Variation, Closed System, Full Symmetry: 1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6. All of them are lines of the English Opening: King's English Variation.

That position has come up in 52,721 Lichess games between players rated 1600 to 2500: White won 46.6%, 6.7% were drawn and Black won 46.7%.