Benefit rates information and benefit calculators which may be useful.
https://www.rightsnet.org.uk/resources/benefit-tax-credit-rates
https://benefits-calculator-2.turn2us.org.uk/
https://www.gov.uk/pension-credit-calculator
https://www.gov.uk/maternity-paternity-calculator
https://www.gov.uk/calculate-statutory-sick-pay
https://www.gov.uk/check-state-pension