Phone checks will not be done for a simple speeding offence. And in any case it would just mean that the phone was in the area not with the bike as the system is very inaccurate. There is insufficient evidence to prosecute. The operator could have wrote down the number wrong, no facial image so impossible to say who was riding it. Regards the 172 how can you say you were riding the bike when there is no number plate or photo evidence to support it. Personally contest it, fpn's assume guilt and the alleged guilty party decide to pay as the penalties at Court are higher. Anpr will again only say your vehicle was at a specific location NOT the offence location. Personally I think if u did it man up take the fine and be honest. I guess that's why the country is in a mess you can't trust anyone because of a lack of honesty. I've been done before and took a speed awareness course. I guess unless u have lost someone through a speeding caused rtc none of us would truly understand how Important it for us all to try and not speed, easier said than done I know.