Nipple was sufficiently opened and drained off quite easily, but it just slowed down to practically nothing. I don't think the tube twisted the nipple closed. Will knock the hand brake off, and try again. The peddle felt like when you pump the peddle with the engine off, and the pressure builds up making the peddle extremely hard to press. 🤷♂️
I cannot see why the handbrake would make as much difference as this.
I would try one of the other wheels to see if you have the same problem. If it’s only this wheel, then maybe remove the bleed nipple completely to see if there is a blockage either in the nipple itself or in the cylinder outlet.
On the other hand, if all wheels exhibit the same issue and you are using a plain tube to bleed rather than a valve, then it points to an issue with the master cylinder.