all answers are something you would find on an ordnance survey map
36 Indicated by -log10c
48 The king can move twice as far on board
53 Just one more "hold up" for Westminster
There is no letter count. Thanks for any help.
For aelmpvw - In chess castling involves moving the king and rook two squares each providing there is nothing in between and the king does not pass through check. Chess is played on a board.
It is only a guess but the clue seems to suggest lobbing off everything after zoo in zoological. - log 1 cal (orie) but that leaves a "0". Perhaps a physics expert can explain.