Hi LL,
1- There are no income tax implications on the receipt of a cash gift unless the cash gift generates interest or dividends. These would then potentially be subject to tax. Further guidance can be found here (
Tax on savings interest and
Tax on dividends).
2- No. Bank transfers from non UK banks to UK banks do not need any type of paperwork from HMRC perspective.
3- No. There are no tax implications for sending savings to the UK, provided those savings are derived from income or gains arising in the tax year they are sent to the UK.
Thank you.