A typical tax code recognized by the UK tax for the year ending 2023/2024 is the tax code 1263L. It depicts the volume of personal relief a taxpayer can claim before applying the income tax. For the purpose of the 2023/2024 year of assessment, the next £12,630 of non-savings and non-dividend income is also exempt.
Source: https://accountingbyte.com/tax-code-1263l/