[bilky asko]

Sudden yes but I don't think it will have been much of a surprise for the staff, the company had been having issues and was up for sale. 

The presenters might not have known for certain before the end of that hour (if it was live) but might well have had an inkling it was coming. The gallery would almost certainly have known at some point before that junction - they'd have had to have got the caption ready, and they're presumably on open talk back to the presenters. 

Probably just a case of the show must go on and business as usual.

Of course, being presenters that will have done thousands of hours of this kind of TV, there are lots of stock phrases that they'll use like "do keep shopping after the hour".

Looking on LinkedIn, it appears that some members of staff were working on the basis that there was going to be no buyer as soon as they suspended broadcasts.