BAE Systems Graduate Submarines Systems Engineer interview questions

Completed an online video interview where I submitted recorded answers. After a 3 month wait I recieved a phone call offering me an online video interview with 2 hiring managers. No one turned up for the interview and after contacting them they claimed there was an internal error and the invites were not sent to the hiring managers. I was told no one else was available to conduct an interview before the selection process began so they had t withdraw the interview offer. For a company of BAE's size it is very disappointing this happened and i will not be applying for BAE in the future.