tvn_ramesh, thank you very much for the answer. I found one number on a letter that is the following:

D025401

Does this sound a the nubmer I am looking for?
For some reason HR at my work gave me a longuer number:
6SL/D025401. I wonder which one should I put

I am applying for tier 1 general type visa, and in the form on page 11 in the question B11 I am supposed to give any current or previous worker reference nubmers. It is stated at the end of the form, that this number can be found in my previous correspondence with Home office, but I can not find it....

I am applying for tier one visa from UK and have the following question: On page 12 of the form I have to give the current address and the previous two. I live in UK for almost 5 years and was living in 3 places. Unfortunately the dates for my first and second address are not correct. I registered w...