The design is simple

Has been tailored in the field to act like long length cargo shorts

Vintage Militaria / Dated 1961

Generally a bit faded

biggest sign of wear is a few pin holes on the front likely where a badge was pinned before

British Army No. 1 Dress Jacket - Royal Yeomanry - Medium Parka The design is simpleAt a glance 100% Wool Material 4 Front Flap Pockets (2 Can be Buttoned) Hook & Eye Collar Closure Royal Yeomanry Staybrite Buttons Kent & County of London Yeomanry Sharpshooter Collar Badges Belt Loops Chainmail Shoulder Epaulettes Royal Yeomanry Fern Leaf Bullion Patch Internal Lining Decorative Cuff Piping Dark Navy Black Colour Chest Size: 42" Suggested Size: Medium Regular Label is missing Sleeve Length: 26" Long Collar to Hem: 32. 5" Modern