Hi Yauhei
There are no tax implications of transferring money from a foreign bank account to a UK bank account, unless that money generates interest. The interest would be subject to tax.
There are no income tax implications on the receipt of a cash gift unless the income 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
Thankyou.
Regards.