Assuming everything you say in your post is true (not accusing you of lying, but just seeing things from the court's point of view) it wasn't you, or your DD driving your car so it could be that you car has been cloned, which is something that does happen.
Have you reported a potential cloning to the police?
Have you any proof that you couldn't have been in the places at the times of the offence? Eg you were at work etc? Your Google timeline is a start, but of course, you could have more than one phone, or not always have it with you.
Have you ever used the roads where the offences took place? Do you have home security cameras that show your car at home/DDs at the times of the offence?
Is there photographs of the car? Is there anything about the car that is different? Stickers, damage, slightly different lights, aerial etc?
If your car has been cloned, it should be reasonably easy for the police to use ANPR data for the two cars along with information about your movements, ie where you work, shop, visit friends and family, leisure activities etc to show this - eg if a car pings one camera and then another 20 miles away a few minutes later.
Yes, definitely check if you have legal cover attached to your car or home insurance, or possibly a work union if you are a member.
But I suppose you have to tell the court that neither you nor your DD were driving in those locations and didn't commit the offences, you were elsewhere at the time, say that no-one else has access to your car, therefore you suspect that your car has been cloned and it is the cloned car that is committing these offences in your name.
Good luck, and try and remain calm. You'll have to declare that you're telling the truth, hopefully they'll believe you.