As a warning, UKBA have been issuing a significantly higher number of "DO NOT BOARD" notices to carriers transporting TWOV cases that would prima facie qualify for the DATV exemption since the threat level was raised to "SEVERE" last week.

Most of these cases are for previous violators of UK Immigration law, failed refugee claimants in other EU states or those who have been refused UK visas in the past. If you fall under those categories, expect additional scrutiny despite your immigrations status elsewhere.