The assessment centre comes in four parts: written exercise, group exercise, face to face interview and presentation.
The written exercise lasts 20 minutes and consists of 6 questions, these questions are scenario based and revolve around the role. e.g. What would you do if a project was due and your colleague hasn't turned up with his share of the work? stuff like that. Just make sure you time it right, give yourself roughly 3 minutes per question and use bullet points to save time.
The group exercise is a little more tense, your put in a group of 5(ish) and you have to come up with 3 ideas that could improve lloyds between you, this part is straightforward but then the assessor starts giving you a different problem every 60 seconds that you have to tackle, this is the stressful part. But soon as it's done you just have to stand up and give a quick presentation on what you agreed on.
Face to face interview. This was not what I am used to, most interviews are competency based but this one isn't. They'll ask you why you went for the apprenticeship, what you like about Lloyds, and then a series of questions about your work effic. One question that through a lot of my group off was "What does collaboration mean to you?"
The presentation comes last, you're asked to prepare a presentation in advance, ours was on a product or service that could improve Lloyds for it's customers. They give you 5 minutes before the presentation starts to write on the flip chart if you want but you don't have to, I just wrote my agenda. Some people printed off hand outs for the auditors, from the sounds of things though it doesn't really make a difference if you do. They're looking for the presentation to last between 4 and 5 minutes, do not go over! Although you won't automatically fail if you do. Also since this is a tech apprenticeship I would recommend that you suggest some kind of technology based improvement.
Overall it was a pleasant experience and there were 15 candidates at my assessment date (there were 30 all together spread across 2 days), they only took 10 people so the odds aren't great but they could definitely be worse. Good luck!