LONDON (Reuters) - British Foreign Secretary Boris Johnson has reservations about granting diplomatic protection to an Iranian-British aid worker jailed in Iran, her husband said on Wednesday. Nazanin Zaghari-Ratcliffe, a project manager with the Thomson Reuters Foundation, was sentenced to five years after being convicted by an Iranian court of plotting to overthrow the clerical establishment. She denies the charges. Her husband, Richard Ratcliffe, met Johnson earlier on Wednesday. Ratcliffe said he hoped Johnson, who will travel to Iran within the next few weeks, will bring his wife home in time for Christmas. The Thomson Reuters Foundation is a charity organization that is independent of Thomson Reuters. The Foundation operates independently of Reuters News.  