Misc: who were once known as 'ona friday'?

Questions

The National day of Ethiopia, 21st March, commemorates a victory at Adowa in 1896 over which country?

Which ultimately disgraced person was 'Surveyor of the Queen's Pictures' until 1972?

A poster depicting Lord Kitchener pointing outwards stated what message?

Who played the role of Margaret Schlegel in the film Howard's End?

Who painted the picture Mr. and Mrs. Andrews circa 1750?