I agree, do you know per chance where this states it's permitted though and by how much, even gov website is usual in it's vague lacking detail.It can be quite small and in grey which makes it a cleaner look .
But be aware they are not legal unless the supplier is on the DVLA's approved list. No one ever checks this though, as far as I am aware.You can Buy them online with Just the Post Code and Bsau done in small font .
Just to update i popped to my local garage they too have their name center bottom but the text is absolutely tiny and acceptable. Much more like it. I feel this Auto spare company bs'd me saying the text had to be that big.