In the GG "How To Speak Cockerney" guide  you will learn that the pronunciation of "Sweet", (which in Cockerney means "good"), is "Swayt".

And in tonight's show every track you'll hear will be Swayt.

Know what I mean?

Come down to Gunn's Grotto with me Peter Gunn tonight - for two hours of Sweet Sweet Music.
 
I've got a Sweet Tooth For My Baby
because She's So Sweet.

Actually she's a Sweet Rockin Mama
and a Sweet Sweet Girl who's Sweet And Easy To Love.

Tonight, we'll Make Sweet Harmony

And that will be...

Swayt.