The Solicitor’s Code of Conduct provides that a solicitor must not represent both parties to the transaction if there is a conflict of interest or a significant risk of there being a conflict at some point during the matter.
There are two types of conflicts of interests:
1. “Own Interest Conflict”: this is where a solicitor’s duty to act in a client’s best interest conflicts with their own interests (e.g. a financial or personal interest)
2. “Client Conflict”: this is any situation where the solicitor carries out separate duties in the best interests of two or more clients in relation to the same or related matters – but those duties conflict or there is a significant risk that they will conflict.
So, same solicitor should be avoided for the both parties as it can cause conflict in client's interest.
If there has been lack of professional conduct/due diligence /or deficiency in the professional services of the solicitor
then you can raise a formal complaint against them via their internal complaint procedure.
You can also escalate it to Solicitors regulatory authority, you can report the solicitor/ firm online using the below web link-
You can also make a complaint to Legal ombudsman , which can be done online using the below website-
you can escalate it to legal ombudsman for the refund of your legal fee
And to SRA so that they can investigate the matter, they have powers to take disciplinary action against the solicitors , including suspending their practising certificates.