The song was included on a chas n Dave al um

I know all the words except for one line...

He’s not all there’s something missing
He’s not all there so folks declare
They call him loopy loopy
Nothing but a great big boopy
When he’s....?????????
I know they think I’m slow
Let em think let em think I don’t care
Sometimes I run errands for the folks
Up at the Grange
With a £5 note they trust me
Perhaps you think that’s strange
But they never call a p’liceman
When I say I’ve lost the change
Cos I’m not supposed to be all there