Walls and attached structures to terraced flower garden

Red brick garden walls enclosing roughly rectangular area of approximately 90m X 50m, aligned north-west to south-east with low parapeted stone retaining wall effectively forming a ha-ha on south-west side overlooking bog garden. The main garden is on 2 levels, the narrow upper level very formal with 3 pools, regular beds and a central loggia of the 1920s or '30s against the north-east wall; the lower level is a wide, sloping lawn planted with trees and shrubs. The main entrance to the garden is via a C20 decorative iron gate near the east corner and there are 2 other entrances in the north-east wall north of the loggia, together with one in the north-west wall. There are steps from the upper to lower terrace at each end and to the centre and further steps lead from the middle of the lower terrace down into the bog garden. Lean-to tool store against the external face of the north-east wall.