onced passed your psv driving test our long is it valid for, if not used for several years

[harryanne]

( psv ) public service vehicle , now called pcv,

[Hopkirk]

It doesn't expire, whether you use it or not. However you have to have regular medicals to keep it current.

The frequency of the medicals depends on your age.

[ojread2]

Once you reached 45 you need a medical every 5 years to keep it up
You will need one of these to go with it to renew it
http://www.tsoshop.co...kstore.asp?FO=1277398
"The qualification will be required by all who want to drive professionally for a living. It came into effect on 10 September 2008 for bus and coach drivers, and 10 September 2009 for lorry drivers. "

[ojread2]

this link explains it in better detail
http://www.direct.gov...sandcoaches/DG_171186

[Hopkirk]

As the link probably explains, you do not have to get a CPC until September 2013.