Concurrent and consecutive sentences
If someone is convicted of committing more than one crime, they are usually given a sentence for each crime.
Concurrent sentences are served at the same time.
Consecutive sentences are served one after the other - eg a 6 month sentence followed by a 3 month sentence.
The judge (or magistrate) tells the person what type of sentence they get and how it must be served.
Further information on types of Prison sentences can be found on GOV.UK's website.