Spanish use two pin plugs!
A fold up bag is useful to bring presents back. If going out of season consider taking a small umbrella. They are expensive to buy in Spain. If you bring your alarm clock radio with you as I do, and it runs off the mains, don't forget to bring your converter plugs with you as Spanish plug sockets are TWO PIN ROUND !
Voltage is the same as in England BUT where as our voltage is closer to 240v AC, Spanish voltage can go as low as 206v AC, especially at peak demand times. Your appliance will work o.k. but say, a kettle will take longer to boil.
Mobile phones;
Many people bring their mobile phones with them but DO remember that a call from the UK will cost YOU even to receive the call. If you are going for a long period, consider buying a Spanish mobile phone, two if you are going with company. Then you can keep in touch with each other when at different locations and CHEAPLY.


Burn't but still alive in Benidorm :)
alicant
Torre levante