Fast-fashion company Shein is considering the possibility of switching its initial public offering to London from New York because of hurdles to the listing in the US, according to people with knowledge of the matter.Shein, which was founded in China but is now headquartered in Singapore, is in the early stages of exploring the London option as it has judged it unlikely that the US Securities and Exchange Commission will approve its IPO, the people said, asking not to be identified discussing co...