Universities pt 2

None of these are great choices for your goals. ESG asset management will likely require a more specific MSc (see climate finance at Imperial or MSEE at Oxford) given the lack of environmental stuff in your UG courses (or hard STEM/econ), and getting UN jobs is basically impossible (save for ridiculous networking efforts) without two to three years work experience. UCL has the best general reputation (equal with Warwick in finance, but much more represented in the IGO space) but those courses aren't great. If you're happy to give up on asset management entirely, you could pick the humanitarian course at UCL, go work for a think tank/NGO for a few years, and then try to recruit for the UN/IGO - potentially after doing a master's at somewhere like the Graduate Institute in Geneva, College of Europe, Georgetown SFS, Yale Jackson, Columbia SIPA, Harvard Kennedy, etc. and to a lesser extent SOAS/LSE/Oxford Blavatnik (UK schools aren't great for IGO recruiting due to the distance from major IGO offices in Geneva/DC/NYC/Brussels). Beware, however, that being a junior in the UN is not a fun and frankly disillusioning job.

For private sector, Warwick Management probably keeps the most options open and if you do a much more targeted MSc afterwards you'll have a chance at ESG finance. However, you'll likely be up against it compared to people who had relevant UGs (especially those with STEM backgrounds who've then transitioned into ESG). I would really broaden your options too as these are very specific goals that are going to be an uphill struggle unless you're a top (both academically and ECs) student at a G5 university in a STEM/econ subject.