Elizabeth may be able to advise you on your legal rights directly, i.e. without the need to instruct a solicitor. She can prepare documents, including pleadings which set out your case. She can represent you in court, tribunals or mediations and can negotiate on your behalf.
There are limits on the types of work that Elizabeth can do as a barrister for you directly. For example, if you have a case that is particularly complex or likely to involve a lot of correspondence, it is likely that a solicitor will also need to be involved.