ICADE E-3 (Spain) - Target for London IB?

Hi everyone,

I'm currently planning my path into
Investment Banking and I'm targeting the E-3 program (Degree in Law + Business) at ICADE in Madrid.

I know ICADE is the top target for the Madrid offices of BBs and EBs, but I was wondering how it's perceived for London specifically.

Does the dual degree (Law+Business) add any value for M&A/IB roles there, or should I just focus on the finance side?
Also, would a Master's at an LSE/HEC be a "must" later on to break into the City?

Any insights from people who made the move from Spain to London would be greatly appreciated.

Thanks!