I don't think times table needs national testing. It's already in NC to be able to do it by end of yr4.
Each school can make sure it happens.
I don't know about past, but now, they spend chunk of yr3/4 doing times tables. Teachers know who can and who can't.
And it's not like phonics, that some children may pass without secure knowledge of tables and have trouble in the future. If they don't recall all, but can calculate quick enough without it, it will present no problem.( I've read some gifted children/adult doing fine without memorising times table on MN.)
I think times table testing should be something similar to pen licence. They should be tested and granted the pass when the child is ready, (which majority would by end of yr4), rather than all being tested at the end of ks2. There will be no time to give failed children proper intervention by then.
And also if they are testing if the child is secure, they don't need to use same question either. There are only limited number of questions(144). They should be able to answer any from 1 x 1 to 12 x 12. And unless one child is getting all the 1 table and one getting 12 and 11, it's fair. Random questions for each child is not unfair, imo.