This link is lurking within various websites but clarifies that HMRC remain committed to their view that VAT is due on search fees unless the searches are simply passed on without comment or analysis (which in substance isn't likely to be the case for most). 

Whilst the case isn't yet binding, HMRC could therefore ask you about four years' worth of unpaid VAT on these and obviously will be keen to understand you are accounting for VAT on these now.