Are the elements lanthanum and actinium considered to be in the d block or the f block of the periodic table?

Many periodic tables place lanthanum and actinium in the f-block of elements, for example, this periodic table from Los Alamos National Laboratory.

However, this table from the Royal Society of Chemsitry places lanthanum and actinium in the d-block.

Which is the most appropriate placement of these two elements on the periodic table? What is the most recent scientific consensus regarding this matter?