When Evans died, Prince Regent was sent back to Dreaper, a livestock farmer who trained racehorses at Greenogue in County Dublin.
It has been reported that "it is necessary to appreciate this in order to assimilate that Arkle had to win two Cheltenham Gold Cups before Tom Dreaper conceded that "he might be the Prince's equal""[7] Following the suspension of National Hunt racing in Britain, many leading British chasers including Roman Hackle and Medoc II were relocated to Ireland.
Prince Regent however, maintained his position as the best jumper in the country,[8] winning several major races and finishing second under top weight in the Irish Grand Nationals of 1943[9] and 1944.
[2] Prince Regent returned in November 1945 and was beaten a head when attempting to concede 42 pounds to Roman Hackle at Leopardstown Racecourse.
The best of his five opponents appeared to be Red April (third in the Champion Hurdle) and the novice Poor Flame, whilst the other runners were the outsiders Elsich, Jalgreya and African Collection.
[10] The first Grand National for six years was run at Aintree Racecourse on 5 April and Prince Regent was made the 3/1 favourite despite top weight of 173 pounds in a race attracted a crown estimated at 400,000.
When the weather eased Prince Regent returned to England for a second attempt at the Grand National for which he was assigned a weight of 175 pounds and again started favourite, this time at odds of 8/1.
In a race run in atrocious conditions with heavy ground and thick fog Prince Regent finished fourth of the fifty-seven runners behind the 100/1 outsider Caughoo.