A charming and uprated classic Morris Mini Mk1, built from an original 850cc bodyshell and now powered by a larger-capacity 1275cc engine bored out to 1,293cc, delivering lively performance in a lightweight and nimble package. The engine is a naturally aspirated 1,275cc inline-four, bored to 1,293cc, driving the front wheels through a four-speed manual transmission with Cooper S ratios. While the car retains its 1964 850cc shell with sliding windows, it benefits from significant performance upgrades more in line with later Mini Cooper S models. This example is understood to have been first registered in Australia in 1966 and has only recently been acquired by the seller. The odometer indicates 3,656 miles, though this is not warranted. Build year: 1964 This Mini is finished in the endearing shade of Haze Blue with a contrasting gloss-white roof, over a tan vinyl-trimmed interior, featuring exposed body-coloured panels and chrome trim highlights. It rides on a set of 10-inch Minilite-style alloy wheels fitted with Yokohama Advan tyres. Equipment includes sliding front windows, push-out rear windows, a Smiths speedometer, and door card storage compartments. It features a 1,275cc engine upgraded with a slightly warm camshaft, twin 1 ¼-inch SU carburettors, an oil cooler, and a 120mph speedometer. Further enhancements include a brake booster, 7½-inch front disc brakes, mini fin drums at the rear, twin fuel tanks, correct offset wheels, an aftermarket wood-rimmed steering wheel, a Smiths rev-counter, and adjustable ‘hi-lo’ suspension. Accompanying the vehicle is one key (originality unverified), a spare wheel, an APV-S seat belt kit, a Haynes workshop manual, and a file containing a collection of printed and handwritten maintenance invoices. Please refer to the photo gallery to assess the exterior and interior condition. Specific notes from the seller include: slight paint peeling on the roof sill, a nick on the driver’s side bonnet line from a previous alignment issue, and minor discolouration on the right-hand boot lid. Inside, there is some sagging on the right-hand side of the driver’s seat due to a collapsed clasp. The seller notes that the horn and wipers can be temperamental. The most recent eSafety inspection was carried out on 24 June 2024, with no advisories or warnings reported. This Mini’s most recent maintenance was carried out in July 2025 at an indicated 3,250 miles, carried out by Readspeed Mini Mecca, and included the replacement of two fuel hoses, a new battery being installed, charging system checks, and choke linkage lubrication and adjustment. In May 2025, technicians at Readspeed Mini Mecca carried out an engine oil and filter change, fitted two new rear wheel cylinders, and replaced the spark plugs. This uprated Mk1 Morris Mini blends classic charm with spirited Cooper S-style performance. Enhanced with a larger 1,293cc engine, alongside discerning supporting performance, cosmetic, and handling upgrades, it offers the excitement of a tuned Mini in an original shell. A delightfully analogue driving experience, this Mini is a wonderful candidate for spirited weekend use or continued show appearances.