omg! are आप fan?!??! i mean, all प्रशंसकों should know that! nvm, आप need a real fan, like me, now this it the answer, they कहा it right on tv! it's because गुलबहार, डेज़ी and blane had to go to another place and do m.i.high there, but they need rose so they kept her, and added two और kids to join, oscar, and carrey, i didn't watch it for 1 साल but still remember ~each~ word! good memory i got here! ;)
It as the actors were too old for the characters as Bel (Daisy) is currently 21 and Moose (Blane) 19/20 while Rachel(Rose) is currently only 17 :D And the end of series 2 the cast were Bel - 19 Moose - 17 Rose - 15 They were replaced with Charlene Osuagwu & Ben Kerfoot who are both the same age as Rachel. Now that the current cast is 17 it is likey that they will left during या at the end of series 5.
Another factor was that they wanted to हटाइए on to other things, Bel continuted अभिनय and went on in 2009 to co-star in a The Royal Court Theatre production of Tusk Tusk and has play minor roles in some TV shows since. In 2008 Moose enrolled himself on a camera course in Islington in London.
I don't know why, but I know it was a terrible idea. Blane and गुलबहार, डेज़ी were the best characters in the दिखाना and they left before they even got to confess their feelings for eachother!!
