Firstly, parents are often told things that are not true. Prior to 2005 it was a complex issue relating to the law of parliament as to whether a parent could talk to an MP. The law changed in 2005.
Even after that Jim Dobbin MP had a constituent who was told by a judge not to talk to him.
Since April 2009 it has been very clear in law that parents can talk to MPs.
The problem in changing solicitor is normally to do with the Legal Service Commission who resist transferring the legal aid certificate.
Many solicitors are also subject to a conflict of interest because the parents are introduced to them by the local authority.
Underlying all of this there is a problem in law evidenced by this recent judgment:
www.bailii.org/ew/cases/EWCA/Civ/2009/1210.html
Para 10 says in essence that the case is about deciding what is best for the child and parents have no right to have an independent assessment of their ability to care for a child.
In essence this mother has a case where the only opinion that counts since 2008 is that of the local authority and its employees. I have seen some of the assessments which are frankly laughable.
Now that is quoting from a court of appeal judgment demonstrating that the system is inherently unfair to parents. The deck is stacked against them.