Hi Dominic Coone
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
Tax on dividends
There are no tax implications on the giving or receipt of cash gifts, but if the person making the gift is a UK resident, they may wish to speak to inheritance tax regarding any inheritance tax implications:
How Inheritance Tax works: thresholds, rules and allowances
Inheritance Tax: general enquiries