This might also be worth reading,
I was going to paste the link but it seems that the disclosure unit has taken it off line, fortunately i saved the document. It's taken from the Registration Matters 12 newsletter published by the then Disclosure Unit
Eligibility of taxi drivers for higher-level Disclosures
As part of the process of receiving a hackney or private hire licence, taxi drivers now need to come via the CRB to obtain a Disclosure.
A number have asked which level of check they should obtain. All taxi drivers will be entitled to a Standard Disclosure. If those countersigning Disclosure applications feel that drivers are likely to be regularly in sole charge of passengers below the age of 18 or vulnerable adults, an Enhanced Disclosure will be available. It will also be possible, but not compulsory, for Countersignatories to request a Protection of Children Act (PoCA)/List 99 check.
Eligibility to receive either Standard or Enhanced Disclosures is determined by the Exceptions Order to the Rehabilitation of Offenders Act1974. The Exceptions Order was most recently amended on 1 March 2002, when a number of clarifications were made and new professions added, including both hackney cab drivers (black cabs) and private hire drivers (mini cabs).
A taxi driver may be eligible for a higher level Disclosure for one of two reasons:
in relation to the grant, renewal or cancellation of a taxi licence
in relation to an application to be employed as a taxi driver.
An Enhanced Disclosure will be available only if the Registered Body believes that the taxi driver in question is likely to be regularly in sole charge of people aged under 18 or vulnerable adults.
Registered Bodies may feel that it is likely that local taxi firms will be engaged by schools on contracts to transport children to and from school.
If you need any further clarification, call the information line on 0870 90 90 811.
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If a council wants to enhance chack all their hackney carriage drivers and p hire dirvers then they must demonstrate a reason for believing that all dirvers will be regularly in sole charge of people under 18 or vulnerable adults.
Now I know that Hereford has a major problem with underage drinkers and clubbers but I would have thought the best way of dealing with that is to deal with the pubs and clubs who admit people underage and not the taxi drivers who need to take them home

or is it a matter again of the council being bullies and picking on peole who do not have powerful representations.
Kevin