Re 31D. The grid entry is a 3 letter abbreviation of which London Bridge is an example.
Can anyone help me with the endgame. The preamble says I should be looking for three clashes in four adjacent cells in one row. I have three clashes in three adjacent cells which I can resolve to make the English translation of the last word of the Latin phrase.
As the Romans used one letter for either of two English ones this explains the two classic variations and the link to the theme word. But I'm worried about the fourth adjacent clashing cell. What am I missing?