Unfortunately, without the additional information requested in my first/previous response, I will not be able to give you detailed advice to your question, but I will be able to give you a general answer, which I hope will be of assistance. If you are able to supply the additional information later, please do so and I will then come back to you with a more detailed answer.
Unfortunately, it is very unlikely you will have any claim against the estate agent.
They are simply the broker between buyer and seller, they do not carry out the legal conveyance on the property, but would normally pass on information from the solicitors or clients. If they have been informed that no probate was required and then that situation changed because of work the solicitors were doing, then the is completely out of their control and really has nothing to do with them.
The issue will be with the other party to the conveyance and their solicitors.
I hope this help clarify the position.
Thank you for using Just Answer and for allowing me to assist you with your legal enquiry. I am pleased I was able to be of assistance. Please do not hesitate to come back to me for further advice on this or any other legal matter. It will be my pleasure to be able to assist you again.