I do Edexcel History and Politics and would 100% recommend doing both. They both often cross over which makes the learning process and revision so much easier. And in regard to applying to uni most unis apart from maybe Oxford or Cambridge don’t really have a preference for it and are just more focused on your grades or UCAS points or your personal statement. I am going to be studying History at UWTSD and had no issues regarding me doing both and when I spoke to them in person they actively encourage it at A Level so you have a wider scope of knowledge for the course as the degree is from 11th century to 21st so both are good for this. But every uni is different. I wouldn’t worry about application to uni just yet and do subjects you enjoy and decide based on that and find a university you could see yourself and like no matter how prestigious it is. Hope this helps!