import re


def is_sedol(value):
    """Checks whether a string is a valid SEDOL identifier.

    Regex from here: https://en.wikipedia.org/wiki/SEDOL

    :param value: A string to evaluate.
    :returns: True if string is in the form of a valid SEDOL identifier."""
    return re.match(r'^[0-9BCDFGHJKLMNPQRSTVWXYZ]{6}\d$', value)