The one geographical barrier preventing the waves of European fads from reaching Great Britain is the English Channel. The channel has long been associated with being a divide from the rest of Europe. The geographer Ptolemy called the channel Oceanus Britannicus around AD 120. Most geographers since have identified the waters with Britain.
The European Union wants to change the identity of the channel. The idea of a divide between the isle and the rest of Europe is harmful for the one Europe worldview. The European Union's geographer cartographers are creating new maps for schools and organization which rename the channel to "the Anglo-French Pond" and "Le Pond." The very notion of a pond, a small contained body of water, is meant to understate the importance of the channel. Naturally, the anti-European Union United Kingdom Independence Party has denounced this effort by the Europeanists.
The English Channel has protected Great Britain from Europe time and time again. But can it withstand Europe while being just a pond? Probably not. However, there is enough nationalism in all of the main British parties to protect their channel's name for the time being.