Sudbrook, or Southbrook, now united to the parish of Portskewett, was once a distinct parish. The ruins of the small parish church of Holy Trinity stand upon the brink of a small cliff overhanging the Bristol Channel, and in the foss of a large camp. It was originally Norman, but was enlarged and altered in the 14th century. Mr. Blethin Smith, captain of a merchant ship, was buried in the chancel in 1757.

Here is a mission hall, erected by the contractor for the Severn tunnel; it contains a good organ and will seat about 1,000 persons. There is also a reading room. The Sudbrook Orphanage was founded in 1890 by Miss Walker. In this place is a ship building yard. Post Office, MO and TO, TMO, Express Delivery, Parcel Post, SB and Annuity Insurance Office, Sudbrook. William Frederick Bartle, sub-postmaster.
Sudbrook Board School (mixed), for 240 children; Walter.James Brett, master.