I can understand using a lawyer for an appeal if parents have got a genuine case (which is not necessarily the same as believing they have, I know! ) but:
"They report more families wanting advice on deciphering the application process, filling in forms and even when to move house into a catchment area to guarantee a place."
Even if they aren't sure the application process is transparent enough to follow without assistance, surely they can just look on the internet for the information themselves? Bluntly put, I think anyone who needs a lawyer to fill in a form is either not intelligent enough to do it themselves or just has more money than sense.