我研究生刚毕业，term time是从2010年9月到2011年9月。
但是我从8月份开始就找了一份trainee的工作，是full-time但不是permanent job。
HM Revenue & Customs 上说：
If you’re an international student you may be allowed to work here when you’re studying.
If you have a student visa you can work here:
－outside term time
－up to 20 hours a week during term time (but you can work more than 20 hours if the work is part of your course or is an internship)
但是Home Office 上说：
You are allowed to:
－do part-time work during term time (see below);
－do full-time work during vacations;
－do a work placement as part of your course;
－work as a postgraduate doctor or dentist on a recognised Foundation Programme; and
－work as a student union sabbatical officer for up to 2 years.
我的工作是full-time的,而且NI是有记录的，我很担心到时候签证中心觉得我没有遵守规定拒签。
所以我到底要不要填我的NI号在签证上面呢？
表格上面是说如果知道，忘记可以么？
如果不填会怎么样呢？他们可以从其他的途径查到我的NI号么？
