The post on spit roasting suggested spatchcocking / boiling the chicken as it was safer and easier. Seems like a plan but it has raised more questions than answers 
Firstly, do I spatchcock first then boil or spatchcock after boiling
Most importantly, how do I know when it'd been fully cooked - there's a number of different answers on the internet - some say watch for a colour change, some test the temperature with a meat thermometer and some say wait until the meat falls off the bone (and some just call him The Stig
)
Also, if the meat does fall off the bone does it matter, can I still spatchcock it?
Cheers guys

Firstly, do I spatchcock first then boil or spatchcock after boiling
Most importantly, how do I know when it'd been fully cooked - there's a number of different answers on the internet - some say watch for a colour change, some test the temperature with a meat thermometer and some say wait until the meat falls off the bone (and some just call him The Stig

Also, if the meat does fall off the bone does it matter, can I still spatchcock it?
Cheers guys