The term Community Anchor is not rhyming slang I promise.
I repeat, the term Community Anchor is not rhyming slang.
Although, if the phrase does pass into general usage, I can see glorious Cockneys dancing down the streets of London Town shouting things like:
"Shat ya' mawf ya' bleedin' Community Anchor!"
"Who ya' callin' a Community Anchor ya' slaaaaag?"
"Geroff that dog 'n' bone and get down them apples and pears you fackin' Community Anchor!"
And so on, adinfinitum or until all the Cockneys die out...
If you actually want to know what a Community Anchor really is then go here.
Only joking! Go here instead.