East Gate, incorporating 3 Hole-in-the-Wall Street

A Gothic-style gateway, mainly of C19 character on a medieval plan, which facing outwards to the E is flanked by single-stage round towers battered at the base. The towers, contrasting the polygonal towers of the castle, are of coursed limestone, largely rebuilt to the S and have loops to the front and to the parapet that was created when the upper stages were taken down. The C19 gateway is set back between the towers, and is of snecked stone with freestone dressings. The gateway has a segmental moulded arch with inset half-height shafts of polished pink granite and foliage capitals, above which is a coped parapet, with raised gabled central portion containing a clock face. To the L of the S tower, above a relieving arch in the Town Wall, are windows inserted on 2 storeys, all boarded up at the time of inspection. In the lower storey are 2 segmental headed windows with voussoirs, above which is a thick roll moulding, and in the upper storey is a 2-light mullioned window of 1872 with plain chamfers.

The passage has a white-brick pointed tunnel vault. In its S wall is a 2-light window with shouldered heads L of centre and a similar single-light window further R. The N wall has a corresponding 2-light window, L of which is a doorway with shouldered head, a boarded door and overlight. On the R side of the doorway is a slate tablet commemorating the site of the Exchequer. On the L side is a larger slate tablet on stone corbels, signed by Trevor Roberts, that records alterations to the tower and its clock in 1833.

In the W elevation, facing High Street, the arch has similar detail to the E side, including a clock face to the parapet. The straight rear elevations of the flanking towers have details of 1872. Each has a tall 3-light mullioned and transomed window with shouldered lights and beneath a pointed arch. Set back further R (known as 3 Hole-in-the-Wall Street), is a double doorway L under a shouldered lintel and replaced double doors, with a single window to its R and 2 windows in the upper storey, all with shouldered lintels.