I am a US expat living in the UK. I am currently renewing my UK visa, but I need to travel during the process. The US London Embassy says
If your current U.S. passport is being held by the UK Border Agency or a foreign Embassy for visa processing and you have urgent need of travel, you can apply for an emergency temporary passport. ... As the temporary passport will not have any UK visas, you must contact the UK Border Agency (UKBA) to find out if you can depart the United Kingdom whilst the visa application is being processed without forfeiting the application and, if so, what documentation you need to take with you to legally return to the United Kingdom.
As the UKBA does not provide a free way to find out this information, I was hoping someone might know if it is possible to depart/re-enter the UK on an emergency US passport without forfeiting my current application.