What to do if I can not find my worker reference numbers?

[londimon]

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.

Is the some way to find out this what is this number (maybe by contacting home office?)

Thank you very much!!!

[tvn_ramesh]

Worker Reference No. is required to be filled by those who were on WP Visa earlier, which can be found on WP Letter issued n if you r not you can leave this Q blank;

[londimon]

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