2014 110 break fluid leak

Intermittent brake warning light on forest track. On inspection of the underside, mid way down the chassis visible brake fluid dripping. Fluid level low, brake pedal travel but secondary system working while there is still fluid. Any obvious culprits or is it likely to be a pipe? Can't get under to check source of leak yet

Likely to be pipe to rear axle, not much else in the middle. Take it easy on way home you will have half brakes.