Around the same time as OTL, but with a Britain-friendly Germany, possibly with a joint German-British, but primarily British, with less German contribution than OTL, naval buildup to oppose France and Russia, and a greater-than-OTL (due to lesser naval expenditures) German army reform and buildup, along with possibly helping to destabilise Austria-Hungary and courting Italy, the Low Countries, Japan, and possibly Sweden and/or China (if they can help China through the process of reform and transition without having it fragment as OTL - maybe kill Cixi and get a series of strong, effective reformers on the throne, while having the expanded Central Powers assist them with reforming and modernising their military, in essence using the carrot far more than the stick?).
Overall, what would make an alternate WWI more interesting would not be a different time, but a different prelude and different alliances.