After the final round, I got to know from recruiter that I wasn’t selected via email and I responded by thanking for their time and effort and then requesting for a feedback — which I think is reasonable given the time, effort and personal cost of travelling to London early in the morning for the presentation. She initially said she would be “happy to give feedback on a call”, but I never received a follow-up. That was disappointing, especially after investing so much time into the process.