Cash deposit(s) at Halifax Espana branches

Hi. I have ended up with a large amount of money in euro notes. I can only pay sterling into my UK accounts and if I open a euro account in the UK  I can only make deposits by euro non-cash methods. All I want to do is pay the cash into an ordinary euro savings account (not an e-savings one) and I about to open one with Halifax Espana over the internet. I then plan on taking my 'wad' to their Barcelona branch on the plane when i next visit. I have an NIE number so opening the account should be straight forward but I wonder if I turn up with the cash and my account details/savings book/card/whatever if I will be allowed to pay it in.

Like other people I don't want to be given the third degree over possible money laundering accusations  so I don't want a wasted journey.

Has anybody done this (or similar) already?

I look forward to hearing about your experiences.

Mike, London. (British citizen)

I Don't know about Halifax but Bankinter will happily accept up to €10,000.  Above that, you have to prove how you got the money.  I'm assuming this is to cut down on the black money issue when selling property.