What was the height of a 18 foot long GWR Coach Roof Destination board, please. I would like to know prototype info, not "You can buy them from xyz Model Shop". I believe there's an article in the latest Great Western Railway Journal, No 98 entitled 'Labelling of Passenger Trains - GF Taylor, roof and destination boards', but as I have little interest in the GWR and I doubt there's a copy in PZ Smiths.... Further information such as there's a (say) 1/2" border between the lettering and the