property being dealt by GPA then firstly to be verified:
executed at UK then counsate should endorse and subsequently it needs to be registered in india at his jurisdiction or at the property where the sub-registrar jurisdiction comes - prime requisite.
verify the title document and obtain the EC which denotes if any liablities or any subsequent transaction are there with the reference to the schedule of the property.
obtain the link documents and if needed get the certified copies.
subject to his you may go ahead.
better to appoint a counsel versed with the real estate property.