The president of the Association of Public Analysts, which represents the scientists carrying out tests on suspect meat, said funding cuts meant there are not enough experts to do the job.
"We don't really have enough people to do the job. Unfortunately the public analysts service has deteriorated over the last few years due to closing laboratories and reduced numbers of public analysts," Liz Moran told BBC Radio 4's Today programme.
"I don't think there are sufficient resources," she added.
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Sir Vince Cable has become the new leader of the Liberal Democrats, after no other nominations were put forward.
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Gordon Brown has said forced child migration schemes that continued until the 1970s amounted to "government-induced trafficking".