Dividend to overseas parents

Does anyone know of any tax implications of making retired foreign parents, who live abroad, shareholders of a ltd co and pay them dividend. I consider this to be a good way to reduce tax liability (esp if they are sent upkeep money on a regular basis), if tax on dividend fall into 32.5% bracket.

Does anyone know of any reason why this cannot be done and if there are any factors to consider.

Many thanks
Sandra