Econpls,
I think the answer to your question is to look at LinkedIn and assess the backgrounds of people working in corporate finance. For me, finance and accounting are the same thing. Whilst non-qualified accountants could work in corporate finance (especially if they are simply populating pre-existing financial models) the level of accounting complexity required to build and operate financial models (especially balance sheet accounting) typically means that it is a field dominated by qualified accountants, although in future AI will change the landscape. I can say this as a highly experienced financial modeller who supports start-ups, M&A and special-purpose vehicles.
Put simply, if you get a CCAB qualification with a big 4 firm (and other large firms such as BDO, Mazars, RSM etc), the amount of roles open to you is vast in the UK and internationally (e.g. industry, audit, tax, consulting, corporate finance), but if you don't qualify and want to work in corporate finance, there will be fewer roles and greater competition, potentially from better-qualified candidates.
The main downside of qualifying with most accounting firms is that you have to do three years in audit as the trade-off for having your training paid for and getting to use the firm's name on your CV. Audit is a great way of understanding how companies work, but it is dull, so think of this period as undertaking a postgraduate degree. An alternative is to go straight into industry (CIMA, ACCA) but this means that your training experience will be linked to a single firm rather than the breadth of experience working say in the Big 4.
If you want to work in corporate finance (e.g. hedge funds, private equity) you probably want to ensure that you train in London, but even then there is no guarantee that the firm you join will allocate you to a specialist division (e.g. banking) as most new graduates are simply canon fodder to be deployed flexibly wherever there is a need until you have gained enough experience to be useful (typically in your 3rd year). The alternative is to skip the accountancy qualification and try to go straight into corporate finance, but this is incredibly competitive and to be honest with you, it is often a case of not what you study at University that differentiates you in this market but what University you studied at (for example, studying Physics at Oxbridge/Imperial is more attractive to these hirers than say someone who studied Finance at Manchester). The big exception to this is computer science graduates as more and more of these jobs now want coding skills and CS at Manchester is highly regarded especially in Fintech.
I hope this helps. These are my personal views only. Please undertake your own career research - the best way is to talk to people who already work in your preferred career path.