Benefits for low earners:

Universal Credit (UC) is the main income support benefit in the UK. It is a means-tested benefit for people who are on a low income, or out of work.
This means that Universal Credit help to top up your earnings and even help cover living costs, dependant on your financial situation.
To qualify you must be aged over 18 but below state pension age, not have savings over £16,000 £16,000, and have household income low enough to qualify.
Details of the household’s income, dependant children, and any disabilities / medical conditions you may have, and housing expenses must be provided in detail when applying.

Pension Credit is a benefit for people who have reached State Pension age and whose income is below a certain threshold.
When you apply for Pension Credit your income is calculated. If you have a partner, your income is calculated together.
Pension Credit works as a top up, so that your weekly earnings meet a certain threshold. The threshold is different if we are single and if we have a partner.