A coroner has questioned the Transport Secretary's decision not to hold an inquiry into the Potters Bar crash.
Seven people died in the Potters Bar rail crash in May 2002
Alistair Darling said on Thursday there would be an inquest but no public inquiry into the train derailment in May 2002, which killed seven people.
On Friday, Herts coroner Edward Thomas said he would be making arrangements for a full inquest.
He questioned, however, whether the powers of a coroner were enough to fully investigate what happened.
In a statement, he said: "The current powers of a coroner, such as they are, may not be sufficient to fulfil the requirements of the necessay public investigation into this awful tragedy."
Seven people killed
Six passengers and a passer-by were killed when the London to King's Cross train derailed close to Potters Bar station in May 2002.
Alistair Darling said he did not believe "on legal or general policy grounds that it is necessary or appropriate to hold an inquiry".
The CPS ruled in October that no rail staff would face criminal charges.
Mr Darling said he made his decision not to hold a public inquiry "after careful consideration".
But author Nina Bawden, who was badly injured in the accident and whose husband Austen Kark, 75, was killed, said: "I am shocked and appalled there is to be no public inquiry.
"An inquest will not provide the full answer. I am so angry about this."