我个人觉得是我们两个都愿意相信的那种解释。下面的文字,红字是confirm我们的想法,highlight的是我们担心的8年的limit,但好像只是说完成PhD之后,如果还想读别的course才需要担心。
http://www.ukcisa.org.uk/student/info_sheets/immigration_uk.php#limit_under18
Some time limits were introduced on 6 April 2012 for degree level study. Any new Tier 4 application must lead to you spending no more than five years on courses at degree level. All time you have spent in the UK under Tier 4 (or as a pre-Tier 4 student) counts towards the 5 years, except for the short extra time you are given before the course (maximum ont month) and after a course (maximum four months).
There are some exceptions to the 5-year cap:
if you have successfully completed a UK degree course which was at least four years long, and your Tier 4 application is to study a Master’s degree at a higher education institution (recognised body or institution in receipt of public funding), the limit is six years.
if your Tier 4 application is to study a PhD at a higher education institution, there is no limit while you are studying the PhD.
if you have already completed a PhD, any new Tier 4 application is subject to an 8-year limit (including courses below degree level).
courses in architecture, medicine, dentistry, veterinary medicine and science, or music at a conservatoire, are exempt from the limit.
if you have completed a UK degree, and your current Tier 4 application is to study certain legal qualifications (CPE, GDL/LPC or BPTC), the legal qualification is exempt from the limit
The UK Border Agency will not grant further leave to someone whose current Tier 4 application means they will exceed these limits, unless there are “compelling and compassionate circumstances”, such as injury or disability.