warning light on vw polo

[HAWKE]

Ihave a low brake pad warning light appearing, the mechaniic checked the pads they are o.k he isolated the sensor but the light keeps coming on ,there is no other function that this light serves as far as i can see . By the way the brake fluid is ok.

[TWR]

Brake fluid low, Handbrake part on,

[HAWKE]

the brake fluid level is ok the handbrake on is a different symbol