大家好，一个挺急的事。我不小心跟房东说了我在等PSW结果，同时学生签证已过期。她就怀疑我是在英国非法居留，一定要我找出相关的法律条例证明。但我将PSW 的 guidance看了一遍，也没找到有关的规定。就只是在lse网站上看到如果申请了PSW，学生签证就会自动延长的说法。因而想上来拜托一下各位，有谁看到过或听说过UKBA对这方面的规定原文的？麻烦提供一下哪里能找到？事情非常急，请大家帮帮忙，谢谢了！
What is my immigration status while my application is being decided?
If you make an application before your authorised stay ends, your existing immigration status will continue until your application is decided, even if the decision is not made until after the end of your permitted stay. If your existing visa or other permission to stay here allows you to work, you can continue to do so until your case is decided.
这个页面最下面的FAQ里的
非常感谢！我也找到一段法律文字，希望对能帮到以后有类似问题的朋友：
Continuation of leave pending variation decision (http://www.legislation.gov.uk/ukpga/1971/77/section/3C）
(1)This section applies if—
(a)a person who has limited leave to enter or remain in the United Kingdom applies to the Secretary of State for variation of the leave,
(b)the application for variation is made before the leave expires, and
(c)the leave expires without the application for variation having been decided.
(2)The leave is extended by virtue of this section during any period when—
(a)the application for variation is neither decided nor withdrawn,
…