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Q - Can you
help? I get my driving licence back next month after
a 2-year ban for drink/driving. I no longer drink but
I do smoke cannabis occasionally. I have to be blood
tested by a doctor before I finally receive my licence
- do you know if they also test for cannabis and if
so would this invalidate my application. I guess what
I'm trying to ask is, how long does cannabis stay in
A - Cannabis
can be detected in blood samples for around few days
to a month, depending on what they are looking for (pure
drug or metabolites), the sensitivity of the test, how
long ago you last used, and how much and for how long
you were using.
If your licence
is refused on the basis of a positive test for cannabinoids,
this should be readily challenged in the courts. There
is no evidence that cannabis causes any significant
impairment in driving or risk to road safety (except
when used with alcohol), and indeed much evidence suggests
that it may contribute to safer driving behaviour, particularly
among young men otherwise more prone to driving aggressively.
I am aware of at least one individual who had his licenced
refused in such a way.
prepared reports in a number of alleged drug driving
cases where test evidence have been successfully challenged
in the courts. If you are refused a licence, you should
instruct a solicitor to obtain all details of the testing
used and seek an estimate for a report from ourselves
concerning all relevant aspects of the case. A solicitor
should also be able to advise you on how to get your
licence back and whether you could seek damages from
the DVLC for any losses suffered, or for wilful disregard
of scientific evidence known to the DETR during formulation