Below is some advice of how to deal with common power cut issues.

Do my neighbours have power?
If there is a common issue please call Scottish Power Energy Networks free on 105 and they will talk you through the next stages.

My TV is off but my lights are working.
If this is the case it is likely to be a problem with one of your appliances that was in use at the time of the power cut.  See advice below, Reset a breaker switch.

Both lighting and TV have gone off 
If you have a pay as you go meter, check that you have credit in it.

If the TV and lights both keep going out. 
Reset the switches as shown in Reset a Tripped Circuit Breaker and try turning off appliances in sequence. One of them may have a fault or there may simple be too much running for the electrical supply to cope with.

My TV is on but the lights are out 
Try another bulb in light fitting; it might be as simple as that.