Before you call any electrician there are some things you can check to see if you need an electrician,
Does your electricity meter have any lights on? if yes, the mains power is being supplied to your property so the problem may be within your property
Are any of your circuit breaker levers facing down? if yes try lifting them up to reset.
Has the main RCD tripped? try to lift it up, some RCD's require you to push the lever down and then lift up to reset,
Still no power, check the following website for any power cut's in your area just in case https://www.ukpowernetworks.co.uk/power-cut
Still no luck, then give us a call