asked the President of the Board of Trade how many oil tankers landed cargoes in the United Kingdom during the past year, giving the British and foreign vessels, respectively?

I regret that the information asked for is not available.

asked the President of the Board of Trade how many vessels registered in the United Kingdom are engaged in the oil-tanker trade?

The number of steam and motor oil tankers of 1,000 tons gross and over owned in Great Britain and Ireland, as recorded in the 1937–38 edition of Lloyd's Register Book, is 394.