Glassdoor puts Goldman's junior analyst basic salary at just over £50k though, which actually is below minimum wage at the hours quoted in this article...
1. Pay in general is lower in the UK than the US. The bank will pay what they can get away with and there isn’t enough competition between banks/consultancies/tech/law to drive pay up. I wouldn’t be surprised if more competitive candidates got higher offers.
2. A lot of compensation can be made up in bonuses, though I don’t know what kind of bonus a junior analyst might get.