Is anyone doing Global Humanitarian Studies at UCL?

I guarantee you that unless you're at Oxbridge, investment banks care what you study, especially at a place like UCL.

"regardless of the degree that you are fully capable of gaining entry to a prestigious academic institution"

This part genuinely made me lol. UCL is massive and literally has courses that accept BTEC/ABB students and even worse students on contextual offers (like GHS). If you are studying GHS, you are putting yourself well at the bottom of the pile. UCL is one of the weakest targets (with Warwick) and is pretty much only targeted for their serious courses. I know this because I literally studied there and have friends who did filler subjects like GHS. They are NOT recruiting well at all.

I'm saying this as someone who actually has a full-time IB offer and knows what representation has looked like at internships I've had at literal bulge brackets. It's not conjecture. You're probably annoyed because you've done a similarly doss degree and know the reality is most banks do not take certain filler UCL degrees seriously, so you're trying to convince yourself with this unnecessarily long rant. But you're not fooling anyone. Trading desks predominantly hire quant students, IB predominantly hires UCL students with STEM/Econ/traditional subject backgrounds. And frankly, if those students have gone through hell studying difficult subjects while juggling internships and will be involved in recruiting the next batch, why would they even look at people taking weaker subjects when they could find people with Physics who also have internships? Why take someone who couldn't even handle their workload?

Do a LinkedIn sweep right now of IB analysts and let me know if you find anyone with bull***t like GHS from UCL please. I'll wait.

Anyone taking GHS at UCL please don't listen to this person. You have clearly indicated that you really know nothing about IB or any finance role for that matter. GHS is a new course at UCL which has been running for less than 5 years therefore, there it is difficult to find any IB positions given for such degree. Nevertheless, GHS is one of the best and most useful courses at UCL, first of all it is a a B.Sc. and has lots of technical qualitative and quantitative aspects to it. Secondly, GHS is one of the few degrees that after uni you will be highly specialised and most probably an expert in the humanitarian field, as we can see with the current world affairs at the moment this is more needed than ever. Mark my words, the GHS course at UCL will be raising their A-Level entry requirements if not next year but definitely in the next coming years.
If we're talking about IB or Asset management, the OP that I am replying to literally does not know what they are talking about once again when talking about subject choices for IB. Like they mentioned (the only aspect they were accurate on), it does not matter what degree you take to go into IB or any finance role. Investment banks and asset management firm will grill Econ students on technicals during interviews as they are studying a degree as such furthermore, IB's and asset management firms receive so many applications for spring weeks from econ students which generally not what they want. Investment banks and asset management firms want the smartest, passionate or hardworking undergraduates from a variety of degrees raging from social sciences, economics etc. If you want to break into any finance role from GHS at UCL you are in the best position to do so as UCL is a target which indicated regardless of the degree that you are fully capable of gaining entry to a prestigious academic institution. Also, UCL have one of the best M&A societies in Europe which allow analysts to carry out industry research and gain deal experience.
Make sure you smash your pre-interview assessments, interviews and make sure your CV and cover letter is immaculate. Also there is no way you will break in to a mega funds like Blackstone out of undergraduate unless you are willing to take a gap year do a masters in finance and get extra internships on top of the IB/asset management internships you did for undergrad.