You can get permanent residence if you are not in a subsiding relationship. Pr or Indefinite leave to remain takes 5 years, 2 X 2.5 year visas. There is no shortcut.
If you have British children,you can apply for FLR FP Parent route once separated. This resets your clock for indefinite leave to remain to zero.
Char (CR001 not Casa)
In life you cannot press the Backspace button!!
Please DO NOT send me a PM for immigration advice. I reserve the right to ignore the PM and not respond.