So I'm just watching on catch up this morning
Robbin I don't have anyone but Ashton from JLS is a good guess
Alien as soon as she sang it was obviously Sophie for me she has a little waver in her voice when she sings. I agree think sometime they let the obvious ones go early like last year with Patsy Palmer and Jake the unicorn due.
Swan I thought maybe Georgina from love island because she's 'loyal' but I don't think she can sing like that. So I thought maybe Kelly Brooke she did strictly no idea if she can sing though. Michelle visage has also been in the U.K. this year filming U.K. drag race so if it over lapped filming wise she could have done both...and she also did strictly.
Dragon...it's could be Courtney act/Shane he was in London for most of lockdown...the voice didn't sound like Courtney but the house with money clue would fit as he won big brother. I was think H from steps though he is welsh and it was all filmed at a welsh castle...I have already forgotten most of the clues but I thought it fit till I read all your guesses 
Sausage sounded like Emeli Sandé to me but I'm not sure the clues fit...I don't know much about her though.
Badger I thought I heard a slight Birmingham accent when he was talking but I don't have any guesses yet.
Anyone know when it was filmed? Knowing that knocks out loads of guesses that either weren't in the country or are unlikely due to having babies ect. I think it's lost likely all this years stars either live or spend long periods in the U.K. I can't see anyone wanting to risk coming over and potentially getting trapped in a lockdown just for the show.
Other than that good start glad Ken isn't here this year although Jonathan seems to be keeping the stupid guess tradition alive in his honour!