I had similar issues with my anglia.
Bottom line was she was not generating enuff oomph in her spark (I had a ballasted ignition - didnt know it and was running a 2nd ballast resistor with the coil I had.) I removed 1 ballast resistor changed the plugs,and all was rosey. (Very few anglias have a ballasted ignition so I was caught out there.
Is your coil OK? How are your points?
I put in a new condensor as it was only $9 at repco, at least if you have her running before the electronic ignition goes in you will happy.