Documents needed to open a resident bank account

[Marc&gemma]

Hi, does anybody have any info on the documents needed to open a resident bank account here & any suggestions on which bank.
We both have U.K accounts but need to open a Spanish account with a card reader available for taking card payments abywhere. When we registered at town hall we were told that it would be a straight forward process but after visiting Santander it appears to be quite complex due to new legislations being pushed upon the Spanish by U.K government!
They are asking for proof of employment from employer here in Majorca & tax records but I tried explaining that I still work for a U.K based company 10 days a month & an in the process of setting up a self employed business here in Pollenca but couldn't really get anywhere with them.. A little confused as surely there are a lot of fortunate people here that have relocated without the need of having to work but who have still opened accounts without any employer info.
Does anybody have any recent dealings with banks or any advice as the Internet seems to say a whole lot of different things. Thanks