Dave, I thought it went:

Wur reight deawn in t' coil oil wheer t' muck slaps on t' win-ders,
Wiv used all eawr coil up an' wi' reight deawn tert cinders,
If bum bailiff calls he wain't knaw wheer ter find us,
Cos we're reight deawn in t' coil oil wheer t' muck slaps on t' win-ders !

Are you sure you weren't using the Midlands version? :-)