In October Britain said it would change the law to make it an offence for a former military pilot to continue training a foreign military after being warned by British intelligence agencies to stop.
Would it be wrong to place a comma before "Britain "?
Thanks.
No, it wouldn’t.
I would rewrite this sentence as follows:
In October, Britain announced it would change the law to make it a criminal offence for a former military pilot to continue training a foreign military, despite being warned to stop by the British intelligence services.