It's not clear, from your post, whether your firm is open or closed for business on these dates. So I'll try to cover both these possibilities:
Bank holidays have no special status in employment law. If a bank holiday falls on a day of the week when you would normally be working, your employer has the right to expect you to work on that day, at your normal rate of pay. Some employers choose to pay extra on these days but they're not obliged to do so.
You're entitled to receive a certain number of days paid holiday per year. This is calculated as 4 times the number of days you work each week. If your employer closes the business on a day when you would normally be working (e.g. on a bank holiday Monday), you should normally be paid for this day but you should be aware that this will come out of your annual holiday entitlement. Some employees prefer not to be paid on such days, in order that they can retain their holiday entitlement for use elsewhere in the year.
Chris