Thank you both!!
first interview
This is competency based. So I got asked first to highlight something from my CV and then the questions I got were dependant on my answers (though they have a bank of qs i think which they choose from, which sort of flows from ur answers). Nothing difficult though, examples included, teamwork, overcoming a challenge, why i would suit being a trainee and suit being at CC. I was also asked about a current issue on loans (only because i said i currently do work in that area, so just know that depending on the experiences/examples you mention you could get anything else asked from that). This is a v standard competency interview. As always use the STAR method and I imagine you will have examples of all the key competencies anyway. So just make sure you can explain everything clearly and concisely.
second interview
This is based on a case study. You go into a room and have 30mins to read some docs and draft an email to a partner highlighting key issues. This is based on M&A. The doc isn't long like 3 pages there are commercial issues and then legal. Go through each of CC's practice areas and highlight the issues that could arise from the transaction. This is v open ended by the way and the interview will go depending on the issues etc you think could arise. So just know there is no right or wrong answer! You have about 10 minutes to present what you think are the key issues and then the partner questions you. Again with the questions, just think of solutions you can offer to the issues you spot, this doesnt have to be legal by the way, could be as simple as two parties just reaching an agreement on their own, just be able to justify it and say why it will be good for the client. For this it helps to link it back to the clients strategy. After then you'll get generic qs on why CC etc.
All in all my experience at CC was the best (not just saying it bc they offered me the TC lol). They are all so nice and friendly, and ultimately from what I realised is that CC want people who are enthusiastic, show an interest in the firm, and who have a personality. The interviews were not difficult for me at all, even the case study interview was like a general conversation. The partners guide you to the answers and explain everything very clearly, its not like you'll be in for a grilling or anything, they just want to see potential! So just be relaxed and be yourself - I know everyone says that but really at CC I was myself and even had a discussion with the partner about films ahah.