The chairman of the Parole Board says a court ruling requiring all prisoners to receive a hearing regardless of their chance of release has led to a huge increase in hearings.
"The implications of the decision, put simply, are that the Parole Board will have to hold oral hearings in a huge number of cases which had previously been dealt with on paper," Sir David Calvert-Smith said.
Just before the ruling the board claimed its case backlog had been at its lowest level for five years, but chief executive Claire Bassett said the judgement is "already having a profound impact on the volume of work handled by the Parole Board".
More top news
Commuters were also warned to expect travel chaos as Doris gathered speeds of nearly 90mph.
A man with 62 penalty points on his licence is among thousands of motorists allowed to drive despite exceeding the limit warranting a ban.
Storm Doris is set to bring severe weather across much of the UK on Thursday as heavy rain and strong winds push in from the west.