National Physical Laboratory interview questions

First, an online psychometric test. Second, an online call with HR. Third (and final), an assessment day comprising a group exercise, interview, and technical discussion. I waited for 2 months to receive information were told we'd receive in 2 weeks. The feedback given on the call was very superficial. They had said I was a strong candidate and gave good interviews but fell short at the group assessment. The information given was contradictory, stating I showed natural leadership but did not follow through on my ideas. I did in fact follow through on my ideas but gave room for others to be express their ideas. Generally deeply unhelpful feedback and inconsiderate behaviour.