From 17th August 2015 a new European regulation comes into play which will change the way that British citizens with property in the European Union can treat their legacies.
Currently, anyone with property in the EU would be advised to make a Will in the country where the property is, as a British Will may not have jurisdiction in that country.
In continental Europe a significant part of an estate (often around half) is reserved for the surviving children of the deceased and must be equally divided between them. This flies in the face of British Common Law which allows (with one or two exceptions) testamentary freedom. In other words, you can leave what you want to whom you want in the proportions that you want.
From August 17th 2015, when the new regulation comes into force, any British national who has property in one of the participating EU States can choose the country of their habitual residence or nationality as the law to govern who gets what when they die. The UK, Ireland and Denmark have opted out of the regulation, but as it is open to all nationalities owning property in the participating countries, Brits can also benefit from it.
All that is required for a Brit to include assets owned in the EU will be a clause in a Will stating that the testator wishes his assets to be governed by English law (or Scottish if appropriate) and the executor's job is made considerably easier