Holywood Post Office is located within the Centra Shop. It's not very well sign posted from the outside but I assure you it does exist. Walk in to the Centra and turn right and you will see it just beyond the checkouts. It is extremely small but does the job selling everything you need to post a letter or parcel as well as greeting cards.
If you're looking for any driving forms, tax documents or passport forms they are located behind the counter and you have to ask a member of staff to give you one.
Word of warning - avoid this Post Office between 4:30pm and 5pm on weekdays as this is when the multitude of local businesses in Holywood send their office post and the queue can quickly get 10 people long. read more