Obviously, all criminal cases, no matter what they are, begin in the Magistrate's Court. Serious offences (in this case the GBH) will automatically be sent 'upstairs' to the Crown Court. With the littering this would be dealt with in the Mag's Court if it was contested, if not then I guess it would be by way of fixed penalty notice. The theft would probably also be dealt with in the Mag's Court, as it is relatively minor. However, if it is a repeat offence, it could be sent to Crown Court for a sentence.
As for the sentences, they would vary according to circumstances. For example, if the thief was a first-time offender etc. The judge/magistrate would be able to use their discretion.
It is also worth bearing in mind any potential defences - although these may not be relevant to your assignment. Hope this helps - J
