Genesis IO rigid steel fork 1 1/8 straight 200mm long steerer & 450mm axle to crown
As far as I can tell this is the same as the M:Part fork (Genesis & M:Part are both Madison brands)
The M:Part Rigid 26" Mountain Bike Fork is a Cromoly Fork with a 450mm Crown to Axle height making it Suspension corrected for most frames. With Disc Brake mounts and also with Mudguard eyelets as an added feature, these forks are a winner with most.
£45 Plus postage, collection is available