Wella singers

In the 50s and 60s many pubs in the London area which catered for locals had a microphone on a stand and perhaps a small raised ‘stage’. This is, of course, in the days before karaoke. Anyone who thought that they could sing was welcome to have a go. Seemed to me that they almost invariably started their song with “wella wella” followed by something like “that’ll be the day . . .”. Hence ‘wella singers’. I think wella singers may well have been found in other parts of the country but I only know of those in the London area. Wella singers were also very generous as they almost always started with "I'd like to give you a song . . ."