Under £15 which includes the freight/postage there is no duty or VAT to pay, if it is declared as a gift this increases to £30. VAT is 20% and the duty varies based on the commodity code but 2 to 3% is normal. The Post Office will charge a handling fee if there is vat and duty to pay. Declared as a commercial sample is also VAT/duty free, and commodity code starting 9705 is 5% VAT (see below).
Of specific assistance is the use of the 97 series commodity codes if you can get HRMC to agree, it worked for me on a 1965 T120R which came through with 5% VAT.
Classifying ‘classic’ vehicles and parts
Chapter 87 includes classification of ‘classic or collectors’ cars and their (‘original authentic’ as opposed to modern) parts for vehicles unless they meet the prescribed criteria found at note 6 to chapter 97 in the Tariff.
Racing cars which can be proven to have been designed, built and used solely for competition may be classified under chapter 97 - if they have achieved significant sporting successes at prestigious national or international events.
In order for a vehicle to be considered as eligible for historic collectors vehicle status, you will have to provide information dating the vehicle’s year of manufacture; and you must also state whether substantial changes have been made to the vehicle as modernised or modified vehicles are excluded.
Repairing and restoring is allowed, and broken or worn-out parts, accessories and units can/have been replaced, provided that the vehicle is preserved and maintained in the historically correct condition.
Note that cars less than 30 years old are generally classified to heading 8703.
If you wish to import a vehicle, and you believe it to be a collector’s piece of historic interest (eg of heading 9705), HMRC advise that you should obtain a Binding Tariff Information ruling.