Doesn't the POA have to be apostilled by the FCO anymore? I know that was the case a few years ago but obviously things may have changed.
Yes the docs still need an apostille. My advice was for her to look up a notary solicitor in her area - the agent she is giving poa to will be able to send her the correct wording in Turkish and instructions and communicate with the UK solicitor.
The problem with laying too many details out on a forum is that some people then take that advice, sometimes put their own interpretation on it, pass it on, possibly elaborate on it and may well end up getting it wrong. Hence mine is short and to the point - find a notary solicitor in the UK and have the Turkish POA communicate with them .