On his return to England, the Government and Army authorities at first accepted Prévost's explanations for his conduct at Plattsburgh and during the War generally. Soon afterwards, the official naval despatch on the Battle of Plattsburgh was published, together with Yeo's complaints. Both these accounts blamed Prévost for the defeat at Plattsburgh. Prévost requested a court martial to clear his name. The trial was set for 12 January 1816, the delay being necessary to allow witnesses to travel from Canada, but Prévost was already in ill health and died a week before it was due to convene. His widow declined the offer of a peerage in honour of her husband, as she did not consider herself and her family to have sufficient means to support the dignity.