Ewan
To be fair to Tower Hamlets Council, they are trying to make the signage more helpful by pointing out that the CPZ single yellow line restrictions do not apply at the times on the white plate. However, they could of course omit the white plate and therefore follow TSRGD rather than going freestyle.
My current favourite freestyle Tower Hamlets signage is shown in my avatar. I don't know which way to go, and LBTH don't either.