We had one on a previous house - unbeknown to us, the property had previously been owned by the local church, when it was sold on they had a covenant included to prevent association with the church moving forward. Our solicitor was of the view that it was very limited in its scope - she was correct and it did not cause us any issues when we purchased and subsequently sold.
Unless somebody wants to demolish the existing stuff with a view to develop then it's dependant on how concerned you are?.