my bros view (who is older than me but he couldnt drive at the time)
you shouldnt of broken the law.
He's arguably broken it himself
a person must not cause or permit any other person to use a motor vehicle on a road [F2 or other public place] unless there is in force in relation to the use of the vehicle by that other person such a policy of insurance or such a security in respect of third party risks as complies with the requirements of this Part of this Act.A quick call to the insurers is always your best bet here. If you're not insured, they might be able to stick you on for a few days for not a lot of money.
As played, ignorance is no defence in the eyes of the law. But I'd be getting my brother to pay the fine.
This habit of "sticking" someone on has hidden dangers. It's not often realised that, as far as Road Traffic Law applies, the insurance is deemed of no effect until the certificate has been delivered.
"A policy of insurance shall be of no effect for the purposes of this Part of this Act unless and until there is delivered by the insurer to the person by whom the policy is effected a certificate (in this Part of this Act referred to as a “certificate of insurance”) in the prescribed form and containing such particulars of any conditions subject to which the policy is issued and of any other matters as may be prescribed."Whether you going to be disqualified, and for how long, for speeding depends on, amongst other factors, driving record, other offences, e.g. no Insurance, and speed.