Please note these are your options
2 from A + 1 from B
1 From A + 2 from B
For a DBS you require
A - Passport (in date)
A - Driving Licence
A - Birth Certificate
B - Utility Bill (3 months)
B - Bank Statement (3 months)
B - Council tax bill (12 months)
B - Mortgage statement (12 months).
B - P45 or P60 statement (issued last 12 months
B - GOV Benefit statement, for example Child Benefit or pension (3 months)
B – Dept. for Work & Pensions, the Employment Services, HMRC letter (3 months)