Experts who work in the sectors where most clients are funded by Legal Aid, notably the Family and Criminal  courts, will know that the Legal Aid Authority (LAA)  operates strict controls over the  fees payable to experts. Their guidance on Expert witnesses in legal aid cases  includes a set of fee rates and for some specialisms defines a standard number of hours that can be charged for a given type of assessment.

However, it is fairly common for the specialist nature of the expert work involved to require a higher fee rate or more hours than the LAA would typically approve. When all parties bar one is legally aided this has led historically to the non-legally-aided party picking up the tab.  A recent case was brought by the London Borough of Barnet with the aim of exploring whether this was correct and to try to standardise the approach taken by the LAA when approving non-standard expert fees.