Lambeth Palace confirmed that he is suffering from the condition but insisted that the Archbishop, 59, is not at "at death's door". It is thought that he has been visited by his NHS medical staff believed to be his GP at his Canterbury home.
Archbishop Welby's spokesman said that he would need "bed rest for a few days" after he was forced to pull out of the annual Canterbury Cathedral service on Christmas Day.
Please pray for Archbishop Justin and for all our Bishops and church leaders as they deal with the busy-ness of the Christmas season. And the (often unreasonable) demands of public office.