The arrangements which allow the exchange of Hong Kong licences for British licences are governed by legislation.
This requires the exchange of a Hong Kong licence even if it was issued as a result of a test passed elsewhere. There is no discretion but officials are considering the effect of the legislation.
Approximately 4,500 Hong Kong licences are exchanged for a British licence each year. Figures are not available for how many were issued as a result of a test passed in Hong Kong as this information is not required for the exchange process.