R 61807 18608
For a 12 figure ref use the first digit of each block to count across and then up the letter grid that you'll find on the OS map. The other 5 digits in each block become the rest of the grid ref.
I'll have a look at my convertor and make it keep the full amount of digits.
Reply | with quote | Posted by FourWinds 7th December 2008ce 16:10 |
|