Here you can find nearest HSBC cash machine ATM. Usually it's free to use a HSBC cash machine if you have a HSBC credit or debit card. Using a HSBC card in another banks ATM might cost you a service fee.
There are many Cash Machine throughout the UK. They are often run by the banks and you should be careful to use an ATM supporting your particular debit or credit card to avoid unnecessary service fees. Usually it's free to withdraw money from a cash machine at the bank who issued the card. Some ATM's are run by individual operators who might charge high service fees.