Originally Posted by Damien_Johnson:
“IIt's too heavy and political for comedians to come on to be lighthearted, have a chat and promote their projects (in amongst the brief pisstaking over the weeks news) - which was essientially the show before 2015.”
We have loads of comedians who specialise in political humour/satire and loads of celebs of other sorts with definite political views. If it was just 'we're going to talk politics and we have this specific agenda' they wouldn't have problems at all.
It may be they are having trouble getting guests in because it's the summer so there's much less going on for a lot of celebs and comedians to promote. The TV schedules are full of sport and will be for a while yet (Olympics starts in a couple of weeks doesn't it?), it's a low period for releases of most other sorts of media (no blockbuster films etc) and a lot of comedians are busy preparing for Edinburgh and probably don't want to waste material on TLL when they could get people paying to hear it at the Fringe.
It
is also possible TLL's schedule has led to a bit of 'burn out' of guests - it seems to have been on pretty much every week for ages and eventually they simply are going to run out of people they want to have on who also want to go on. The Olympics/Paras will help wth that as they can concentrate on having sports people who don't normally get media exposure as guests and will be mostly talking about the games. After that they probably should have some time off - maybe come back in October/November in time for the leadership elections & party conferences or something.
TL-DR - coincidence does not imply causality. There are several possible explanations, we don't know what is going on behind the scenes so we can't say definitely.