[yorkie_chris]

I think this section 59 thing damned unjust, an easy way to give you a hefty fine with no evidence required.

However, I thought it was necessary for you to be warned BEFORE they could sieze your vehicle, since I presume there was no other reason for them to sieze it.

Regarding further action, did they give you any reason to expect further punishment? As if you were under the speed limit then that isn't a worry, and "your tyres were making a noise" is shaky ground for any other charge.
What were you doing? Repeatedly lapping the roundabouts or what?

I think I would be contacting a brief. Would this sort of thing be within the remit of legal cover given with the car insurance if there is any?