Lendable (UK) Software Engineer interview questions

Interviewing is a two way process. Rejecting someone for unknown reasons without providing feedback as to why, I think is a poor way to conduct the process. I appreciate it takes time and effort, but the time and effort has already been taken on the interviewers part to discern that a canditate is not suitable for "x" reasons, the time and effort contributed by the interviewee should be acknowledged as such and feedback should be given especially when asked. It takes literal minutes for that feedback to be passed along to a hiring manager and then to the rejected applicant. Not doing so encourages applicants to not re-apply in the future even if they have filled in the missing skills.