Taxed Salary Amount from India to UK - Tax Implications

Hi, wondering if I transfer my Indian salary money (from previous work experiences) which is already taxed in India to my UK bank account -
1. Would this amount be taxable in the UK?
2. If no, please elaborate on the evidence / proof needed to justify that the money is taxed in India?
3. Is there a threshold / restriction on the amount of money to be transferred?
4. Will this money need to be declared through self-assessment form of the year? or when this money needs to be declared?

Hi Srishti
Please see guidance at Paying tax on the remittance basis (Self Assessment helpsheet HS264).
Thank you