Why would you take English and not History to HL in IB, if you would take that in A-level...? That seems an odd choice. Otherwise, both qualifications are widely accepted around the world, so there's no real issue with taking one or the other in terms of possibilities in studying in the UK or elsewhere. IB is definitely a very high workload, and you will have a lot of contact hours. Depending what your future plans are, the wider background IB provides you may be useful in a "soft" sense - it won't help you gain admission anywhere over A-levels if you are doing comparably well in each. However, having stronger writing skills or mathematical/quantitative skills, or some language background, could be useful for some degrees.
Anecdotally, a friend of my sister's who did IB (same as both of us) and went on to do medicine at Cambridge said she basically was teaching her A-level background friends (who had all done 3/4 STEM A-levels) on the course how to structure an essay. In a similar way having some more quantitative background than an A-level student who hadn't taken A-level Maths may come in useful on a STEM course (e.g. in biosciences/chemistry), and having a languages background might be useful if you wanted to pick up a language ab initio at uni or were doing a course where languages are very useful (e.g. history, archaeology, anthropology, history of art).
If you took HL History/Bio/Chem you would have the same range of options of degrees in the UK as A-level History/Bio/Chem. Your SL subjects won't give you "more" options, they will just provide you with possibly some wider skills you wouldn't develop in A-level (notably, having some more mathematical background and continuing with French). SL Maths is not a subsitute for A-level Maths in almost any case, so it's unlikely that's going to make any difference, and degrees involving French language study almost always expect A-level/HL French as a prerequisite. Beyond that you'd just have taken economics to some extent, which isn't a required subject for any degree, to HL or not.
Purely in terms of admissions though, the additional SL subjects aren't a benefit and can be a gamble as IB offers are normally made on both getting certain grades in (or across) your HL subjects, as well as an overall score (sometimes also contingent on getting no grade lower than e.g. a 5). As such, if you ended up dropping the ball on one of your SL subjects, it could then cause you to miss your offer (another friend of my sister's missed her offer for Cambridge medicine due to the cohorts English coursework being remarked and dropping from a 6 to a 5). If you aren't very confident in your ability to manage the workload, it may not be as worthwhile to do IB.
Ultimately if you are able to do equally well in both, either is going to get you to the same places. However, determining whether you will do equally both is something you need to reflect on and nobody can really tell you definitely if you will do well in both. Something I would suggest is, given you've done very well across your GCSEs, think more specifically about which parts of your GCSEs you did or did not enjoy. For example, if you weren't particularly interested in and/or didn't enjoy writing about literature and critically reading literary texts, you probably won't enjoy IB English that much and it may be better to avoid having to continue with that subject altogether. Likewise if you struggle or find tedious language learning or mathematical problem solving, then again, you can avoid these by not doing IB. On the other hand, if you are interested in scientific areas for future plans, but feel you might get bored or find it monotonous doing mainly those subjects without any other kinds of study (e.g. essay writing, reading, etc) then IB might help keeps things fresh and interesting for you throughout the course.