There is no rush to deal with the estate of your loved one. You can wait until after the funeral.
If you have not yet located a Will for your loved one, it is important to find out if your loved one did in fact have a Will. The Will should set out your loved one’s wishes with regard to their estate. If they did not leave a Will they will be considered to have died intestate.
If there is a Will, it is likely that executors have been appointed and these will be the people/person who are entitled to deal with the estate. If the Will is being held by the solicitors, only the executors will have access to it. In order to obtain the Will the executors will have to contact the solicitors and prove their identity usually with photographic evidence.
If the deceased did not leave a Will then the Court will appoint administrators for the estate.
If you are an executor or you believe that you are entitled to deal with the estate then you will need to apply for a Grant of Probate. At this point you may want to consult a solicitor for further advice and the next steps to take.