We decided to go with the Banco Halifax based in Mazarron.
If you have an English Halifax Bank Account and you set up a Banco Halifax Account transfers are free.
As we complete in a few weeks, we decided to transfer some money over to cover the cost of our holiday whilst we are out there. Eventually they hope to have internet banking up an running between accounts, but for the time being you have to transfer using telephone banking. We transferred £500 over to our Banco Halifax Account very easily. The person we spoke to was English and we got the exchange rate of 1.235 when our nephew, who collected currency from the post office the same day, got 1.2 tourist rate.
There is no charge for the account as long as you kept an average of 600€ in but we decided to upgrade to the xtra account for 25€ per year charge. (no minimum balance, assistance with plumbers, electricians, locksmiths, translation service, card cancellation services, medical advice, legal advice, utility registration service (although sticking with polaris) and home help.
The account was all set up from England.