you need to know the difference yourself so you can pick holoes in their assertions. Thay are far too busy with unlawful building works etc to really worry about a sign (unless a councillor complains on a sunday!) so give the stock answer without considering the 21 different classes of signage.
usual VCS chisellinga nd basically lies. read all about airport aprking and prohibitive signage, grace perios etc and you will see what is wrong with this demand.
DO NOT respond to it, get all of your info first and let them waste their time and money chasing you to no avail.
they know tey are wrong but hope you are one of the 85% who pay up
nop they cant email the WS, typical lazy Renshaw smith tactic.
When it gets to just under 2 weeks to the hearing you write to the court and complain that you havent received their WS and ask for it to be struck out as they have failed to follow the court's instruction.
Civil procedure rules state that such things have to be in writing by letter. you might agree with them that email is OK but they cant choose that for themselves.
Now tell us exactly what is going on and post up the WS as well. Please make it clear abotu the whens and wheres etc