Movie is set in England or Scotland in 70s? A boy about 11 follows a dog to a ruined farmhouse and when a clap of thunder happens he goes through a fireplace back in time to world war 2. He meets the family that lived on the farm and helps a girl that has been traumatized by the loss of her parent in a bombing.

An Angel for May (2002) (http://youtu.be/YeIzuQxp31A)

Yes, that's it! Thank you

Its angle for may like you said. I ove that movie but its soooo sad