Corporate Banking Advice?

Hi all,

I am within 2 months of graduating from a UK semi-target (Durham) on track for a first in an econ/finance degree, looking to get into Corporate banking at firms where it's under the IB umbrella. The problem is I've got no good work experience/internships other than a couple small AM firms as I struck out last year for various reasons. I'm therefore wondering what my course of action should be -

Option 1 - One-year masters, too late for LSE/Imperial (also couldn't get that funded) but I may be able to swing something like Cass Corp Fin, then apply for internships.

Option 2 - Two-year master's e.g. corporate finance at King's, aiming to do it right this time and get an internship in the middle.

Option 3 - Full time applying and just risk it, maybe spend the year doing something less prestigious like commercial banking. 

Anyone got any thoughts? what are my chances? I know I've probably messed up but I wasn't aware of the importance of internships etc.. earlier in my degree.

Thanks.