The Red Rose of Lancaster is the county flower found on the county's heraldic badge and flag. The rose was a symbol of the House of Lancaster, immortalised in the verse "In the battle for England's head/York was white, Lancaster red" (referring to the 15th-century Wars of the Roses). The traditional Lancashire flag, a red rose on a white field, was not officially registered. When an attempt was made to register it with the Flag Institute it was found that it was officially registered by <answer>Montrose in Scotland</answer>, several hundred years earlier with the Lyon Office. Lancashire's official flag is registered as a red rose on a gold field.
Whos flag officially is a red rose on a white field?
Montrose in Scotland