Patents are territorial rights and are enforceable only in the jurisdictions they cover. A UK patent will only give its owner rights within the United Kingdom. This includes the right to stop others from importing articles which infringe the owner's rights into the UK. If an applicant desires patent protection in other European countries or the USA for instance, they must make separate applications at the European Patent office or the US patent office, as at present there is no single world-wide system of granting patents, although there are some treaties/ conventions (Covering Europe, US, and other parts of the world, see Patent Cooperation Treaty route here
) that award a patent applicant protection in a number of jurisdictions. However, it is important to note that what you get in these instances is not one single patent as such, but a bundle of national rights which must be pursued individually. Furthermore most jurisdiction will have specific (and usually slightly different) requirements that must be satisfied before a patent is granted from the single Patent application.