@carnut222 these very much the symptoms I've experiencing at the moment and I very much believe that it is an electrical issue.
I've tested the battery, and found it to be close to death. Used a battery tester at work for a more in-depth reading. Came up to show 0 charge in the battery with 33% health. Very bad. Charged it up overnight from yesterday. couldn't get a reading afterwards due to surface charge.
git back home and attached it back in to the connectors and it started right away. tested voltage with engine on, worryingly no difference was found. stayed at 12.6v and draining slowly.
figure bad alternator?
also idles rough though evens out after 5min of driving, then reverts back to rough idle at a stop. lack of power to generate consistent spark?