This is true, however it's possibly worth mentioning that some countries require visas for entry not normally the ones at <£300 but it's a point to bear in mind. America for instance requires the ESTA (visa waiver for citizens in selected countries) - they also apparently don't like it if you don't have a destination booked on arrival at customs or so I discovered, whoops.
You have to register your entry to most country's now online before you go. My parents had to when the went to italy.