Hello everybody, I settled the matter once and for all: I asked July's page the lyrics.

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Hello Who's There

Hello who's there, hello who's there, hello
Hello who's there, hello who's there, hello
Could it be a Lady with a flower in her hair

Who goes friend or foe, who goes I don't know, who goes
Who goes friend or foe, who goes I don't know, who goes
Could it be young Kevin with another Hastings Pier

One two, one two three four who's that knocking at my door
Why don't you go away, if you don't say what you want to day
Could be the rent man after last weeks due
Pay me up or else I'll get the fuzz on to you
Don't forget the Tax Man, it could be him too
Pay me up or else I'll get the fuzz on to you

AB, ABCD who's that calling out for me, it's still a mystery
I want to be as sure as I can be