Thanks for your enquiry.
I am afraid that although your suggestion is quite ingenious, it would have no legal standing.
As none of you own the road, and I trust there are no restrictions in your Title Deeds prohibiting parking, there is nothing you can do to stop the naughty neighbour.
However, if the van is not taxed, you could always phone the Council, who may come and remove it.
I hope this answers your question, and if so, I would be grateful if you could press the Accept button.
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