These are fully boxed UK products, they are not OEM parts.
Available with iSpec EV or band-on shifter. If you're unsure what this means then iSpec EV lets you mount it to compatible Shimano brakes or a 3rd party adaptor. The band-on clamps to the handlebar and can be run with any model of brake.
Chainring: XT SM-CRM85 Single Chainring M8100/M8130 12 Speed RRP £74.99
Crankset - CS-M8100 12 Speed
Features an entirely new construction, using direct mount chainrings, special gear tooth profile for improved chain retention, and a 172mm Q-factor
For use with 12-speed Dyna-Sys DCE single chainrings (which you can select from the options)
52 mm chain line for use with 142 / 148 mm rear axle width
Shifter - Shimano XT SL-M8100 Right Hand Trigger Shifter
Rapidfire Plus 12-speed right hand shifter with Instant, Multi and 2-Way release to exceed the demands of ever changing bicycle designs and riding styles
2-Way release: the upper lever still performs the same shift function, but it can now swing in either direction allowing it to be released by the thumb or index finger
Available in 'Band-On & I-SPEC EV'.
Chain - XT/Ultegra M8100 12 Speed
Super narrow lightweight 12-speed Hyperglide+ chain for smooth shifts and maximum durability
Shimano 12-speed Hyperglide+ chains have computer designed plate profiles to operate seamlessly with Shimano DCE 12-speed chainrings and cassette sprockets, resulting in 1/3 faster shift time than Hyperglide systems even under load
Sil-Tec surface treatment technology (PTFE plating) on inner and outer links and rollers that is smooth running and increases durability
Comes as a 126 link length (can be shortened to size using a chain breaker)