Personal Allowance reduction impact on other tax bands

I pay income tax at the basic rate, but my earnings are near the top of the band. My Personal Allowance has been reduced this year due to unpaid tax from a previous year. Does the reduction in Personal Allowance have any impact on the threshold of the higher rate tax band for me, or would the threshold remain static at £50,271? For example, if my Personal Allowance was reduced by £500 to 12070, would the threshold at which my earnings are taxed at the higher rate also be £500 lower, i.e. £49,771? Thank you for any clarification you can provide on this.

Hi,
Tax is paid on the amount of taxable income remaining after allowances have been deducted.
The basic rate band is £1 - £37,700 - 20%. For example, if your income is £50,271, your personal allowance (from your example) of £12,070, would be deducted from this leaving £38,201. £37,700 would be taxed at 20% leaving the remaing £501 taxed at 40%.
Thankyou.