It is always instructive to read financial reports when you are researching organisations. 38 Degree's accounts are hilariously difficult to find on their website. Follow these instructions:
Go to their home page: http://38degrees.org.uk/
Click the "ABOUT" tab
Click the "FAQs" menu item
Read through 871 words and click the link "here."
On the page entitled "Donations to 38 Degrees" read through 643 words and click the link "here."
Click here for 38 Degrees full audited accounts
Regrettably the accounts fail to give any insight as to where 38 Degree's £888K of income received up to the end of September last year came from. More digging required.