I've come up with a few ideas as to how the 'Commonwealth of England, Scotland and Ireland' could survive.
The first flaw I believe is the trial and execution of Charles I. Now I believe that Cromwell, rather than basically give false evidence towards Charles I he simply should've had him tried, and this would lead to a sentence lighter than execution, most likely simply being imprisoned. This would shock the continent and also people at home and would also stop the 'Society of King Charles the Martyr' from forming.
The next POD is in 1651 while Charles II was trying to flee the country, as in OTl he left the main part (headed by Lord Derby,) this party was later captured while Charles managed to flee. Let's say Charles chooses to stay with the main party and go towards Hartlebury, they are later captured and Charles II is imprisoned in Hartlebury Castle, and later moved to Windsor/Tower of London with Charles I.
Another POD would have to be that Chaloner Chute (though I can find no information about this on the internet I was told at a house that this is true,) had actually finished his document on making England a full Republic with a new constitution, possibly by delaying his ill health by some years. This would lead to a President and also a set Parliament that would hopefully work.
Then we come onto the obvious one, the heir to Cromwell. Cromwell at this point could still pick an heir through the rights given to him by being the Lord Protector, and he picked his son Richard Cromwell, who had barely any support at all in Parliament or the Army. Now if Oliver Cromwell had picked his son-in-law Charles Fleetwood, who was a member of the Parliament, and was also a skilled and experienced soldier the army probably would've supported the Lord Protector. This would lead George Monck to also support Charles, rather than in OTL when he saw the weakness of Richard he stayed silent.
The first flaw I believe is the trial and execution of Charles I. Now I believe that Cromwell, rather than basically give false evidence towards Charles I he simply should've had him tried, and this would lead to a sentence lighter than execution, most likely simply being imprisoned. This would shock the continent and also people at home and would also stop the 'Society of King Charles the Martyr' from forming.
The next POD is in 1651 while Charles II was trying to flee the country, as in OTl he left the main part (headed by Lord Derby,) this party was later captured while Charles managed to flee. Let's say Charles chooses to stay with the main party and go towards Hartlebury, they are later captured and Charles II is imprisoned in Hartlebury Castle, and later moved to Windsor/Tower of London with Charles I.
Another POD would have to be that Chaloner Chute (though I can find no information about this on the internet I was told at a house that this is true,) had actually finished his document on making England a full Republic with a new constitution, possibly by delaying his ill health by some years. This would lead to a President and also a set Parliament that would hopefully work.
Then we come onto the obvious one, the heir to Cromwell. Cromwell at this point could still pick an heir through the rights given to him by being the Lord Protector, and he picked his son Richard Cromwell, who had barely any support at all in Parliament or the Army. Now if Oliver Cromwell had picked his son-in-law Charles Fleetwood, who was a member of the Parliament, and was also a skilled and experienced soldier the army probably would've supported the Lord Protector. This would lead George Monck to also support Charles, rather than in OTL when he saw the weakness of Richard he stayed silent.