Travelling on US Emergency Passport whilst....

[punx4life]

...Tier 1 (General) Leave to Remain is processing.

I know this topic has been done to death and the general consensus seems to be that if you travel while the UKBA is processing your passport, your application is withdrawn.

However, I came upon this:

"You must not withdraw an application if the person:
travels outside the CTA on another passport, an emergency travel document or illegally, unless they also request the return of their passport for travel outside the CTA..."

This is apparently the official instruction for officers deciding on cases.
http://www.ukba.homeoffice.gov.uk/sitec ... iew=Binary (page 51)

Any thoughts on this?

Should I travel on the emergency passport or not?