In 1918 he designed a Water tower for Royal Naval Air Service at Killeagh, Cork. In 1923–1924 he designed the first phase of this bandstand as one of the earliest reinforced concrete structures of its kind in the UK. It was supported above the tidal beach on concrete pillars sheathed in cast iron, so that it was level with the promenade. Its cantilevered roof supported seaward-facing balconies with space for deckchairs, and sheltered both a lower deck and the stage. Metal, glazed screens at the east and west sides of the building crossed the promenade, and could be moved to protect the audience from wind, or retracted into the wings to allow promenaders to cross when no band was playing. The seating area in front of the stage was a railed-off section of the promenade, and the seating on the roof above the stage included two copper-covered domes, plus two domes which doubled as refreshment kiosks. In the 1920s and 1930s the conductor of a visiting military band was considered a VIP, therefore a red carpet would be laid across the road so that he could make his grand entrance from the Connaught Hotel opposite the Bandstand. Between 1927 and 1928 he designed the alteration of Cavendish House, no. 32 Old Burlington Street, Mayfair, City of Westminster, London W1S, to create a new fifth storey for a picture gallery, and to rearrange space for shops on the ground floor. This project was originally called the Coombe Improvements Scheme. In the spring of 1929, Dyson teamed up with fellow consulting engineer Gower B. R. Pimm to design a road over river mud at Dartmouth. It was described by "The Times" as "an engineering feat". It was a piece of road intended to connect Dartmouth's North Embankment of the River Dart with the Dartmouth-Torquay road, thus easing traffic between Plymouth and Torquay. It was to become the Rue de Courseulles Sur Mer, part of the A379, and the estuary mud behind the road was later reclaimed as a leisure facility. A 30 ft carriageway and two 10 ft footpaths gave the road a 50 ft width. A retaining wall protected it from the river, and piles 20–45 ft long, each weighing four tons and driven in rows of three, prevented the road from sinking into mud, although these were not needed for about 200 ft at each end: foundations were shallower so that hard core and a reinforced concrete containing wall were used there.