You are at no risk whatsoever.
In the UK we are subject to the following on import:
2.3 What are the limits for customs duty and import VAT?
Commercial consignments i.e goods you have purchased, of £15 or less are free from customs duty and import VAT.
Note: This does not include alcohol, tobacco products, perfume or toilet waters; these items are excluded from the relief of duty and VAT at import.
In addition, commercial consignments sent to the UK from the Channel Islands do not benefit from any relief of import VAT.
If you are sent a gift with a value of £40 or less, which complies with the rules shown in paragraph 2.4, it will be free from customs duty and import VAT. Gifts of alcohol, tobacco, perfumes and toilet waters are subject to the limits shown in paragraph 2.5, while gifts of perfumes and toilet waters are subject to the limits in paragraph 2.6.
Customs duty becomes payable if the value of the goods is over £135 but duty is waived if the amount of duty calculated is less than £9.
In summary:
Goods Value*
Customs Charges applicable
£0.01 to £15
No customs duty
No Import VAT**
£15.01 to £135
No customs duty
Import VAT due
£135.01 and greater
Customs duty due, but waived if the amount calculated due is less than £9
Import VAT due
*Excludes the following goods: alcohol; tobacco products; perfumes and toilet waters. These items do not benefit from the relief of customs duty or VAT at import, and alcohol and tobacco products will also be liable to excise duty.
**Commercial consignments sent to the UK from the Channel Islands do not benefit from relief of import VAT.
There are a number of other circumstances where relief from some or all customs charges may be available. If you think your goods may be eligible for a relief you should contact the HMRC Excise and Customs Helpline on Tel 0845 010 9000 for further information.
from HMRC website