Car brought out of hibernation in March and ran ok, Two weeks ago went for a drive and no brakes! Checked fluid level empty but no sign of leaks. Managed short drive to local garage today, using handbrake, and their report this afternoon said in spite of careful inspection of brake lines, calipers and all connectors no sign of leakage could be found. Their suspect is the brake master cylinder, but before they source a replacement has anyone else had a similar problem? Forgot to mention that after finding empty fluid reservoir I refilled it and it has stayed full for the last week.