Palestine Action supporters urged to demand they are taken into custody if they are arrested

I doubt they can demand it without committing another crime. But they can for sure make life hard for the police by not carrying any ID and refusing to identify themselves.

They can't street bail you if they don't know who to pursue at their convenience. Which is what street bail is, a convenience for the police so they can pick people up one at a time.

So most of the police will be busy with protests. Seems like a great opportunity for a heist