See what Too Tall said about him or any other guest Tweeting before speaking to Showmasters. Showmasters will announce any changes as soon as official. They do not go by rumours or Tweets.
As representatives from showmasters have always said, and on several occasions, cut myself down on is that if showmasters haven't announced it then he's still appearing. Showmasters would of announced his cancelations if it was true as it was a few weeks back. He's coming to the show sO if I was you, I'd start to get excited. Showmasters have had a go at so many people for saying that they should of announced people cancelling and that they don't inform so that people will still come to the show thinking the guest will still be there and seeing as the word that Colin pulled out was weeks ago, showmasters have had plenty of time to check to make sure he'll be there so trust he is. I have family travelling from Manchester to this show with the main purpose to meet him. Have fun
To play devils advocate here I would argue that Showmasters cannot afford to lose a big named guest at this point. From a business point of view it would make far more sense for them to keep Colin on the Bill until they can replace him with a guest of similar importance and fanbase. Not to disrespect any other guests but if Colin is cancelled at this stage who is left to pull the crowds in? Robert Llewellyn does have a huge fanbase but is he alone enough to advertise and fill an event? Not in my opinion.
Always remember that business' are there to make money period, if they can please people at the same time then so be it but this is not their primary goal. I would not be surprised if it was announced a lot closer to date when some more big name stars have hopefully been added.
Just my 2p