2 days of assessment centre. before that, a lot of online test/ online video interview etc leading to an AC offer. 1st day AC was introduction, presentation and a written test (by surprise - wasn't told about it); we got to live in a 4 star hotel overnight, dinner with current grads and staffs. 2nd day was very intense, competency interview, technical interview, role play, group exercise and ur presentation prepared beforehand. GSK house in london is a very nice glass building, professional but with a relax atmosphere, fountains and high street style corridor.