Whilst searching on Google for something else, I was given this link to Hansard (record of the Houses of Parliament in the UK) which is a question about the level crossing at Clones railway station, allegedly from 1950.
Clearly this is wrong as the UK Board of Trade would have had zero authority over a level crossing in the Republic of Ireland at that date.
Update – I have found a listing of the Presidents of the Board of Trade and based on the information therein and the reference in the link above to Mr. Ritchie holding that title, the date range for this query is 29 June 1895 to 7 November 1900, being the period that Mr. Ritchie held that position.