Well as you may have seen in my last post I was removing my rear brake.
After having a chat with an old school car mechanic, he told me that if you want to remove brake lines, change pads etc, & get ###### of with bleeding brakes afterward, then try this, it works...
First remove top of master cylinder & rubber piece under it, then cover with glad wrap, then put rubber piece back on top & screw steel cover back into place.
(This creates some sort of air lock)
Then I removed my whole rear brake line from the front splitter box.
With next to none fluid loss.
Plugged the hole with block off.
Then unscrewed master cylinder & removed glad wrap, then screwed cover back on.

Best of all no need to drain fluid or top up, or even bleed brakes.

Try it guys it rearly works!

 

Good tip. Thanks.