Congratulations to Gavin Bate of Adventure Alternative on his recent attempt to summit Mt. Everest and becoming our highest altitude Yellowbrick user! Gavin didn't quite manage to reach the top on this attempt due to failure of his breathing equipment, but we were pleased to see that our tracker worked at 8500m and -35 degrees. Raising almost £75,000 for the Moving Mountains charity will surely be an achievement in itself for Gavin.