Background: BMW introduced the 1 Series as its entry-level model range in 2004, bringing its front-engine, rear-wheel drive brand of driver focus to a subcompact market otherwise dominated by front wheel-drive rivals.

For the first time, drivers had the option of a brand new BMW at a lower price point, rather than having to settle for a second hand 3 Series and the market responded as BMW had hoped — with enthusiasm.

Initially offered as a hatchback, coupé and cabriolet, it garnered widespread approval from critics and customers, despite styling that was initially less well received but has since become a part of the motoring landscape in the intervening 20 years.

Naturally, BMW offered performance options to supplement the standard engine ranges, with the M135i at the very top of the pile, powered by a 315bhp turbocharged 3-litre N55 straight-six, driving through a ZF 8-speed automatic gearbox.

Compact and light, the M135i is less hot hatch and more mega hatch, flying to 62mph in...