Re: Purchase of Land
Whatever you were shown when you made the deal is not part of the contract. The only thing you're buying is what's on that map, so if you're not happy with it, don't sign contracts until you clarify it. Take the map and check the boundaries yourself with what you were shown, check it with your surveyor if you have one. Any reasonable vendor shouldn't have a problem explaining the difference to your solicitor very quickly if it is road frontage.
Once you sign the contract, you've accepted the map is correct and can't afterwards try to change it if there's a mistake. It may well not be worth pursuing to the point of losing the sale, but you must be clear about the price and boundaries before you sign. An extra 0.65 acres is worth a small delay I would think.