The volunteer cavalry corps of Northumberland were uniformed in the normal light dragoon manner; the Bywell troop and Royal Cheviot Legion with scarlet jackets, the former with green facings and the latter with blue. Both units wore Tarleton helmets but the details of turban and plumes not clear. According to a portrait of the very young Hugh Percy, the Percy Tenantry corps wore a dark green jacket with black facings, silver (white for other ranks) edging and chest lace with white breeches and black knee boots. The Tarleton Helmet seems to have had a black turban with white or silver angled thin stripes and a black plume.
When the Northumberland and Newcastle Regiment of Yeomanry Cavalry was formed they adopted the contemporary light dragoon uniform with blue jacket, light blue collar and cuffs, plastron and trousers all lace was gold / yellow. The bell topped shako was black. In the 1830s the plastron disappeared and the overalls became dark blue with light blue stripes. In 1850 the bell topped shako was exchanged for an Albert pattern shako. In about 1856 a tunic was adopted and worn with the previous shako for some years. The tunic was double breasted with light blue collar, cuffs and piping and although the lace became silver / white the shako had gold lace fittings and lines. A dark blue kepi was taken into wear during the mid-sixties and it apparently retained the gold caplines and fittings. There are indications that a trial busby of unorthodox type was adopted by some officers in the early 1870s but other ranks appear not to have worn them.
In 1876 the regiment converted to hussars and by 1880 all ranks had been issued with the new uniforms. The conventional six-loop hussar tunic was worn with white square cord and silver ball buttons. The shoulder cords were white. Overalls had double white stripes. The 1857 pattern busby had a scarlet bag with white lace and button as did the busby boss and caplines. Unusually, the busbies of the officers continued to be decorated with gold lace, bosses and caplines. The plume was white over red.
In the late 1880s knee boots and pantaloons were introduced and by 1895 the 1857 busby had been replaced by the 1887/8 version. All equipment was white with black pouches and SNCOs had a silver crown on scarlet backing on the flap. NCOs wore silver chevrons and crowns on a scarlet backing. From 1890 an arm badge of a castle had been approved which for senior NCOs and permanent staff was of silver wire on a French Grey backing. Sergeants had a smaller metal castle (of a different design) also on a French grey backing. This badge would soon become the regimental badge. All trade and SAA badges were originally on scarlet backings but by the mid-1890s, they were on blue backings although trumpeters still retained scarlet. Bandsmen wore lyres on the right sleeve. By 1900 the Northumberland Hussars were considering changing to light blue facings (then described as French Grey).
Stable jackets followed the conventional pattern for other ranks being blue with white piping on the collar and white loops on the cuffs. Silver piping and jacket edging was worn by sergeant-majors and above with special ¾ inch lace being worn by the RSM, RQMS and other senior staff. Pillbox caps were blue with white bands and buttons for ORs and silver Austrian Wave lace for Sergeants and above. The RSM and RQMS had extra figuring on the crown. In 1898 plain blue five button frocks with breast pockets were issued and generally replaced the stable jackets. The RSM wore a special patrol jacket with six black mohair loops across the front. He appears to have been the only staff member to wear the blue silver edged Torin cap with silver badge on the left side being worn by officers in undress.
Khaki was adopted after the Boer War and worn with a slouch hat that had a French Grey puggaree. The staff pattern peaked cap taken into wear in 1902 also had a French Grey band and piping. Full dress with overalls was worn by the route lining contingent present at King George Vths coronation in 1911.