You should ensure the new purchasers are aware that sharing a driveway does not give them a right of access over your garden.
Some years ago as an executor I sold an inherited property. The property came with a car parking space. A neighbour arrived and asked that we vacate the space as soon as possible as they needed the space and had been told they could park there. Needless to say, they were unhappy/irate/crestfallen/really upset when I told them I had sold the property and its parking space and they had ansolutely no right to park there. People will say anything to make a sale (e.g. “ah sure, there's no problem reversing in there to park”).
You should check with the Property Registration Authority
https://www.propertymapsireland.com/ if the owners of the property next door have a right of way over your property, i.e. a right provided for in the deeds or otherwise, or if they have acquired one based on continuous use (i.e. for over 20 years). If they don't, it would be prudent to get your solicitor to write to the vendor's solicitor requesting (i.e. demanding) that purchasers of the property be informed that they have no right of access over your property.