New bread of multi use gravel bikes that run 27.5 and 700c+ wheelsets

Bombtrack Hook EXT -

So what does the EXT stand for? Well the truth is we can’t even remember any more, extreme, extended, extraordinary…take your pick. The important thing, is what the Hook EXT is. Built on a 27.5” rim and using a wider tire produces a wheel with the same outer diameter as a typical 700x28c. This means it’s possible to run bigger knobby mountain bike tires, with all the grip they offer, yet retain the geometry of a CX/gravel bike, something gravel racers have long dreamed of. This is made possible thanks to a specially designed frame that utilizes a wider bottom bracket and yoke to maintain a wide yet short rear end. The Columbus Cromor double-butted tubing has the perfect blend of being lightweight yet durable, perfect for gravel riding. The fork was then developed specifically for this bike, with a super wide crown offering massive tire clearance and a stiffer tapered steerer tube for more accurate handling.
The SRAM Rival 1 is ideally suited to the Hook EXT, thanks to its simplified 1x design with clutch derailleur, wide range cassette and X-sync chainring providing smooth shifting in any conditions. The hydraulic brakes bring a superior stopping power to the EXT, which is reassuring on steeper technical descents. The versatile build is designed to offer as much all-round use as possible, so if your journey is mainly on-road, swap out the wheels for a set of 700c’s, with anything up to 45c tire.
LINK and another road cc not sure if it comes as frameset or complete bike only at £2199

Open U.P.P.E.R - updated version of the Up at an eye watering £4300 for frameset only!

LINK

NS RAG+ - now this is alot better value for money £1650 - read a review HERE again it can be run with 27.5 (up to 2.2) wheelset as well as 700c (upto 40c), none in the country yet but landing soon.

RAG+ is short for Road And Gravel Plus. This is because you can run it with standard 700c road tyres, 700c gravel tyres (up to 40c) or even 27.5 inch mountain bike tyres and wide as 2.2 inch!
The RAG+ is perfect for anyone who wants a real all year round drop bar bike capable of grinding gravel roads, CX racing, commuting, adventure touring and even classic road use.
It features the latest technologies including a 1x drivetrain, hydraulic disc brakes and thru-axles front and rear.

Specifications:

Frame: NS Bikes 6061 T6 custom formed and butted tubes, 142x12 dropouts, fat tire clearance

Fork: NS Gravel+ carbon fork, 15mm dropouts, NS thru axle
Crankset: SRAM S350 1x X-SYNC™ 42t, 170/175mm
Stem: NS-Bikes RAG+ stem, 90/110mm
Seatpost: Kalloy, 30.9
Handlebar: Zipp Service Course 70-Ergo
Brakes: SRAM Apex hydraulic disc, 160mm rear & front
Saddle: Octane One Rocket w/hollow cromoly rails
Wheel: NS Rotary on Alex Draw 2.1P Asymmetrical, 32h, tubless ready
Tires: Panaracer Gravel King SK 70x40c, brown side-walls
Weight: ~9.9 kg (w/o pedals)