Question to the Department for Transport:

To ask the Secretary of State for Transport, how many blood sample tests requested by DVLA as part of a fitness to drive medical were required to be retaken due to a previous blood test being a (a) haemolysed sample, (b) clotted sample and (c) insufficient sample in each of the last five years.

The number of blood tests requested by the Driver and Vehicle Licensing Agency as part of a medical fitness to drive investigation in the last five years is shown in the table below:

Information on the number of blood tests that needed to be retaken or the reason why is not readily available. Retrieving this information would require the interrogation of each individual case to identify the reason for which the blood test needed to be re-taken.