You'll be expected to know:
Toynbee Hall SAFE - ID guide.pdf
See this detailed guide to what type of identification is acceptable to open bank accounts and other financial services.
https://compare.moneyadviceservice.org.uk/currentaccounts/Step1
Unbiased bank accounts comparison chart allowing young people to choose the right service for them
http://www.moneysavingexpert.com/banking/basic-bank-accounts
Written by Martin Lewis, Money Saving Expert
UK campaign 'Move Your Money' which is about taking control of our money and choosing socially responsible bank for yourself. Formed in response to financial crisis in 2012.
https://www.moneyadviceservice.org.uk/en/categories/running-a-bank-account
Money Advice Service offers free, unbiased and independent advice on everything related to running and choosing a bank account. It also has further information on credit unions.
http://moneyfacts.co.uk/guides/banking/what-is-a-continuous-payment-authority/
Quick guide with extra information on CPA
http://www.financial-ombudsman.org.uk/
Financial Ombudsman Service is an independent service in the UK for settling disputes between businesses providing financial services & their customers.