I don't think it would Change much for France. The more interesting effect it would have on the career of this British General whose Name elapses me. Up to the 1815 campaign he had a good Service record (well at least not a bad one). Since Napoleon the careers of sucessful Generals usually included a political career when they grow older. (Schwarzenberg suceeding Metternich, Lee becoming president of the Confederation, Mac Arthur becoming President after the second civil war, Benedek after his sucessful campaigns against the Prussians and later against the Russians)
Ahh theres the Name: Wellesley - Imagine a Wellesley government in Britain - I assume he would improve the British army and not letting it decline. A British viictory might even prevent the diplomatic loss at the Second Viennese Congress of 1816. The loss of Malta and Gibraltar to the Habsburg puppet Maltese Knights and Spain respectively did effectivle ban the Brits from the Mediterrenaean. That means that the 3rd French republic does not hold on Egypt and the Negrelli canal.