Like the Scottish Gregory's Girl, they did another dubbing to eradicate the Scottish accents so Americans can understand the dialogue. They have done it on other films from there also such as That Sinking Feeling. They used to redub the dialogue on Australian movies shown in USA. Even Dirk Borgarde related that when he made his first films in London after the war, he went into a theater to see them with a friend and was shocked to find his voice had been overdubbed and he was not told.
The Full Monty was also a stage play which was staged in Australia but did not do too good but it should have. I saw it and liked the performances. The lady playing the piano in that stage show is the same age as my Mother(86) and at around 14 they both worked in the same stage theater during the War.
I look forward to the Blu Ray. I see no trailer is listed as such. In theory, the partner to The Full Monty is Brassed Off.