Travel Adaptor for Spain The electrical sockets used in Spain are type F. You will therefore need a UK 3 pin to type C/F adaptor in order to plug in your appliances. Please be aware that whilst a travel adaptor will allow you to physically plug a UK 3 pin plug into a different socket it will not change the voltage or frequency of the supply. Tweet Voltage - The mains voltage in Spain is 230 V which is compatible with all UK appliances (UK voltage is currently specified as 230 V +10% / - 6%). Frequency - The frequency in Spain is 50 Hz which is the same as the UK.