It really does beggar belief!
The amount of people who instruct a Solicitor to act on their behalf in matters far beyond the appointed Solicitor's field of expertise and, the amount of Solicitors who try and bluff their way through these matters.
We have recently seen a case where, an immigration Solicitor had taken on a Tenant versus Landlord matter and completely confused the Tenants Act with the Law of Property Act, a complete waste of everybody's time and money.
A good Solicitor will point you in the right direction via a referral or recommendation of a fellow professional in the required field. A bad Solicitor will attempt to bluff his/her way throughout, usually referring to written references of similar past case studies or, consulting the Internet (Not advisable as, the chances of the same Judge under the same circumstances is slimmer than a Postcard from the moon).