Your local further education college for details of their opportunities. Skill produces a range of leaflets and booklets about funding in further education and training. Details at the end of the leaflet. The idea of open learning is greater flexibility for the student, so lengths and styles of packages can vary greatly. Open learning packages can sometimes be quite costly, so make sure you find out all the details before making your final decision.
Many people find they have to apply to educational trusts to raise money to pay their fees.
Skill keeps a list of useful trusts. As the options are not full-time, maintaining income benefits should not be a problem, but you will need to check your own entitlement to make sure. Your local further education college will tell you what is available locally and the local library will also hold a lot of helpful information. If there is a local adult educational guidance service near you they will also be able to help. Skill has an information sheet on opportunities in open learning which will give you an overview of what is available and some useful contact addresses.