Hello I am a lawyer with over 15 years experience, i will try to help you with this.
can you please just clarify, How large a van is it and is this a public road? Are you very close to exchange of contracts?
does this affect access to the house?
Large delivery van .it is a dead end no through traffic.
I have just noticed that you are in Northern Ireland. I expect that he situation is the same in England and in Northern Ireland but I can only really only properly advise you on English law. This may not be what you require. Let me know if you want me to carry on.