Loving Luxembourg as the new measure | Brief letters

Student loans | Antarctic iceberg | Photographic memory | Dog-ends | Don’t be a tosserNeil Gammack (Letters, 11 July) asks what a graduate earning £21,001, with a debt of £50,000 a year, would have to pay every month to offset the interest on the loan. He thought it would be a huge sum, I suppose, and was angry that the Guardian refers to the student loan as a “so-called debt”. Repayments are not based on the size of the loan but on the graduate’s salary. You