If you are adopting or fostering a child permanently and becoming their legal parent (‘fostering to adopt’) you are entitled to 52 weeks off work and you could also be eligible for Statutory Adoption Pay for 39 weeks.
Your employer pays the Statutory Adoption Pay.
Find out details of eligibilty, current rates, how to claim and how adoption pay is calculated and paid, at GOV.UK.
Alternatively guides to Adoption Leave & Pay are available from:
Guide to Maternity Benefits
A detailed Guide to Maternity Benefits is availaible at GOV.UK. Alterternatively check your parental rights at work at CitizensAdvice.
Further details and advice is availble from MoneyHelper and Turn2Us.