A seventy-five tonne, eight-six foot long steam-powered road train is likely to cause traffic congestion across Dorset this weekend.

The huge four-vehicle convoy is travelling a hundred and fourteen miles from Sussex for next week's Great Dorset Steam Fair, raising money for the Teenage Cancer Trust along the way.

However, it's only able to move at about five miles an hour, which could mean frustration for anyone getting stuck behind it.